Spot

Spot (pronounced spot)

(1) A rounded mark or stain made by foreign matter, as mud, blood, paint, ink etc; a blot or speck, differing usually in colour or texture from its surroundings.

(2) A small blemish, mole, or lesion on the skin or other surface (popularly associated with pimple, zits, blackheads etc).

(3) A small, circumscribed mark caused by disease, allergic reaction, decay, etc.

(4) A comparatively small, usually roundish, part of a surface differing from the rest in color, texture, character etc.

(5) A place or locality (used also in the plural, often to describe places of entertainment, sightseeing locations, historic sites etc and also used of things like parking spots).

(6) In organisational structures, a specific position in a sequence or hierarchy.

(7) In playing cards, one of various traditional, geometric drawings of a club, diamond, heart, or spade indicating suit and value.

(8) A pip, as on dice or dominoes.

(9) In slang, a piece of paper money (5 spot=$5 etc).

(10) As a clipping of “spot illustration”, a small drawing, usually black and white, appearing within or accompanying a text.

(11) A small quantity of anything.

(12) In ichthyology, a small croaker (Leiostomus xanthurus) with a black spot behind the shoulders and fifteen oblique dark bars on the sides, the habitat of which is the US east coast; the southern redfish, or red horse (Sciaenops ocellatus), which has a spot on each side at the base of the tai; both popular as food fish.

(13) As a clipping of “spot market”, the informal terms for commodities (grain, oil, wool et al) sold for immediate delivery and payment at a price quoted at the point of sale.

(14) A slang term for a spotlight.

(15) To stain or mark with spots:

(16) In dry cleaning, to remove a spot or spots from clothing, prior to processing.

(17) In any context, to make a spot; to become spotted.

(18) In the military (often as target spotter or spotting), law enforcement or among criminals etc, to serve or act as a spotter.

(19) In billiards, a clipping of “spot ball” the white ball that is distinguished from the plain by a mark or spot; the player using this ball.

(20) To look out for and note; to observe or perceive suddenly, especially under difficult circumstances; to discern.

(21) In informal use (US) in some games and sports, to yield an advantage or concession to one's opponent.

(22) In zoology, a term used to describe various dot-like patterns (ladybirds, leopards et al) seen on the skin, wings, coats etc of some animals.

(23) In sports, an official determination of placement (where a referee or umpire places a ball, sets the point at which a penalty kick is to be taken etc).

(24) In broadcasting (radio & television), brief advertisement or program segment.

(25) In gymnastics, dance & weightlifting, one who spots (supports or assists a manoeuvre, or is prepared to assist if safety dictates); a spotter.

(26) A variety of the common domestic pigeon, so called from a spot on its head just above the beak.

(27) In the jargon of financial trading, the decimal point (used to ensure no ambiguities in oral exchanges).

(28) In physics, a dissipative soliton (a stable solitary localized structure that arises in nonlinear spatially extended dissipative systems due to mechanisms of self-organization); known also as a pulse.

(29) In slang (US), to loan a small amount of money to someone.

(30) In analogue & digital photograph editing, to remove minor flaws.

(31) In ballet, to keep the head and eyes pointing in a single direction while turning.

(32) To cut or chip timber in preparation for hewing.

(33) In naval aviation, to position an aircraft on the deck of an aircraft carrier ready for launch by catapult.

(34) In rail transport, to position a locomotive or car at a predetermined point (typically for loading or unloading).

1150-1200: From the Middle English spot & spotte (a moral blemish), partially from the Middle Dutch spotte (spot, speck, mark), and partially a merging with the Middle English splot, from the Old English splott (spot, speck, plot of land).  It was cognate with the East Frisian spot (speck), the North Frisian spot (speck, piece of ground), the Low German spot (speck) and the Old Norse spotti (small piece) and the Norwegian spot (spot, small piece of land); it was related also to splotch.  Describing originally some flaw of character, the idea of a “speck, stain left by something on a surface” emerged in the mid-fourteenth century, picked up from the Old English splott.  The late Middle English verb spotten (to stain, mark) was a derivative of the noun.  Variations of the form are common in Germanic languages but the nature of the spread and evolution remains murky.  From the early fourteenth century it was used to describe “a patch or mark on the fur of an animal while the sense of a “particular place, small extent of space (on a body, etc”) dated from the late 1300s, the general figurative use "a blemish, defect, distinguishing mark emerging at the same time, concurrent with the now familiar use to refer to pimple, zips etc, soon to be celebrated in the medical literature as “an eruption on the skin”.  The adjective spotless was from the late fourteenth century spotless (without flaw or blemish; pure).  The adjective spotty was from the mid-fourteenth century spotti, (marked with spots (of the skin, etc)) and it entered figurative use in the sense of “unsteady, irregular, uneven, without unity” in 1932.  Spot is a noun, verb & adjective, spotter & spotlessness are nouns, spotlike, spotless’ spotty & spottable are adjectives, spotting & spots are nouns & verbs, spotlessly is an adverb and spotted is a verb & adjective; the noun plural is spots.

The early nineteenth century use of “spotty” in art criticism was originally a critique and unrelated either to the later technique of divisionism (sometimes called chromoluminarism), most associated with Neo-Impressionist painting and defined by the colors being separated into individual dots or daubs or the “dot paintings” associated with some forms of Indigenous Australian art.  The meaning “short interval in a radio broadcast for an advertisement or announcement” dates from 1937, an extension of the earlier use in live theatre to describe “an act's position on a bill”, noted since as surprisingly late 1923.  Although it’s likely to have been longer in oral use, in 1901 it noted in the US as a term for a prison sentence (5 spot=5 years etc).

1971 Ford Mustang Boss 351.  Even when standing still the thing undeniably had a presence but the sheer volume of the rear coachwork created blind spots and the dramatic roofline (said to be highly aerodynamic) restricted rearward visibility, the glass close to horizontal.

The term “blind spot” began in optics in 1864 describing a “spot within one's range of vision but where one cannot see” which in 1872 was described scientifically as “the point on the retina insensitive to light (where the optic nerve enters the eye”.  The figurative use (of moral, intellectual matters etc) dates from 1907 while the literal (a field of vision blocked by some fixed object) was used by 1912, originally of those suffered by omnibus drivers and later it became familiar when describing defects in the visibility offered by the design of early automobiles.  Dating from 1888, “hot spot” was originally a term from dermatology which referred to the focal point of a skin irritation and was literal, the temperature at the (usually reddish) site slightly higher.  In 1931 it was use of “nightclubs or other entertainment venues" (which after 1936 were “nightspots” generally) while it came into use in fire-fighting in 1938 after research indicated the most effective way to prevent spread or lower intensity was to find the points of highest temperature.  It 1941, it came to be applied to “a place of international conflict”.  The famous g spot (also a g-spot and short for Gräfenberg spot, named for German gynecologist Ernst Gräfenberg (1881-1957)) entered English in 1981 although the doctor had described it in a paper published in 1950 but similar finding are in documents dating back centuries.  He also developed the intra-uterine device (IUD) but despite these notable contributions to science he died in obscurity.

The noun spotter (one who makes spots; one who observes things for some purpose) was first used in 1876 as a slang for “a detective”, picking up from the verb in the secondary sense of “catch with the eye” and by 1903 it was used in the general sense of a “look-out”, adopted with apparently equal enthusiasm by police and criminals alike.  It was a designated position in hunting and target practice by 1893 but the military appear not to have picked it up until the World War I (1914-1918) although such tasks had existed for centuries, pre-dating even artillery, batteries of archers supported by an observer who reported their accuracy of fire.  In the navy, they were also called “sighters” and the use of “spotter” for this purpose has even extended to electronic hardware.  The sunspot in 1818 was again from dermatology and referred to “a spot on the skin caused by exposure to the Sun”, the term picked up in 1849 by the early heliophysicists to describe the “spots on the surface of the Sun”.

Spotlights (actually anti-aircraft searchlights) used to create the Lichtdom (literally "Cathedral of Light") effect at the Nazi's Nuremberg Rallies during the 1930s.

The spotlight (source of artificial light casting a narrow, relatively intense beam) was first described in 1904 as a piece of theatrical equipment with the figurative sense dating from 1916 where it could carry either negative or positive connotations (unlike the companion “limelight” which was always positive).  The military did use the term spotlight but the “searchlight” was a more frequent entry in lists of materiel.  The hobby (which for some seems either a calling or obsession) of train-spotting was first documented in 1959 (the train spotter having been mentioned the previous year) and referred to those who observed, collected and collated the numbers of railway locomotives, one’s status in the field determined by the number of unique entries in one’s list.  The habit caught on and there are also car spotters, truck spotters, bus spotters and plane spotters, the last once causing an international incident when a group were arrested outside a Greek military airfield by police who confiscated their notebooks and cameras, accusing them of spying.  The matter was resolved.

Hitting the spot: Crooked Hillary Clinton enjoys a shot of Crown Royal Bourbon Whiskey, Bronko's restaurant, Crown Point, Indiana, Saturday 12 April, 2008.

In idiomatic use, the phrase “hit the spot” (satisfy, be what is required) was first document in 1857 while the companion “spot on” doesn’t seem to have been used until 1920.  Earlier, “on the spot” by the 1670s meant “at once, without moving or delay” and a decade later “in the precise place and time” hence to be “on the spot” implied one “doing just what is right and needed”, a form noted since 1884.  The term “man on the spot” assumed some importance in diplomatic and military chains of command in the times before modes of communications were global, convenient and real-time, a recognition the one best equipped to make a decision was “the man on the spot”; then all certainly were men.  To “put someone on the spot” or “leave them in “a bit of a spot (or a “tight spot”)” was to “place them in a difficult situation”, use dating from 1928 and 1929 respectively.  The “spot check” (an inspection of a sample chosen at random) was first described (though doubtless a long-established practice) in 1933 and was used as a verb by 1944.  The term “sweet spot” is a mid-twentieth century formation which means “the optimal point and is used to describe (1) in acoustics the point of optimal sound delivered by the positioning of speakers, (2) in economics the optional outcome in a cost-benefit analysis, (3) in sporting equipment the location on a tennis racquet, baseball bat etc which produces the most satisfactory effect on the ball, (4) in phonetics the state of harmonic resonance in the larynx which produces the perfect sound and (5) as a euphemistic, the clitoris, G-spot or other source of sexual pleasure.  Generally, it’s used to mean “any ideal location or situation.

In zoology, the nomenclature can mislead non-specialists: The black spotted estuary cod (left) is a fish with black spots whereas the black spotted pond turtle  (right) is a black amphibian with white spots.

Spot in its original sense a taint, stigma, stain or blemish on the character of a person is still used to suggest some moral flaw and is related to “can’t change one’s spots” & “a leopard can’t change its spots”, the implication being character flaws are inherent.  A “weak spot” is a specific deficiency and a “soft spot” is a “particular sympathetic affection or weakness for a person or thing” which should not be confused with the “soft underbelly”; such is a vulnerability.  To “hit the spot” is an acknowledgement a need has perfectly be satisfied (typically used to mean hunger has been sated or thirst quenched.  In the matter of the weather, if it’s “just spotting”, the rain is light.  A “black spot” is something bad or dangerous while a “bright spot” is a highlight or something positive in a sea of bad news.  The use of the phrase “X marks the spot” has expanded somewhat but originally meant “one will find what one is looking for under an obvious sign”.  Spotted fever was a term for a number of tropical diseases (the reference to the symptoms which appeared on the skin) dating from the 1640s.  The spotted dick (suet pudding with currants and raisins) appeared in recipe books in 1849 although the date of its creation is uncertain.

Spotted dick (sometimes known as spotted richard) with custard.

In June 2018, it was reported the Strangers' Dining Room the UK’s House of Commons in Westminster had changed the name of “Spotted Dick” to “Spotted Richard” although in other parts of the country, the suet & dried fruit sponge dessert remained on sale under the traditional name.  Derided by many as “wokeness” or “political correctness gone mad” the restaurant staff confirmed the change had been made in case anyone found the conjunction of spotted and dick “confronting”.  There’s no suggestion any complaints had been received which might have prompted the change but ideas soon flowed about the way people might be protected from other culinary micro-aggressions: Apple crumble was thought to be potentially offensive to those diagnosed with anxiety disorders so it might better be called apple support while the extra virgin olive oil offered with breads could be triggering for the Incels (involuntary celibate men).  Perhaps such oil could be labelled young because one certainly doesn’t wish to trigger the Incels.  The sight of Cock-a-leekie soup on a menu would be challenging for both the incontinent and those recovering from certain STIs (sexually transmitted infections which were once known as STDs (sexually transmitted diseases and before that venereal disease (VD)) so it would be better to play it straight and re-brand as chicken & leek soup.  It wasn’t until the 1970s VD began to be replaced by STD (VD thought to have to have gained too many specific associations) but fortunately for AT&T, in 1951 they renamed their STD (Subscriber Toll Dialing) service to DDD (Direct Distance Dialing), apparently for no better reason than the alliterative appeal although it's possible they just wanted to avoid mentioning “toll” with all that implies.  Many countries in the English-speaking world continued to use STD for the phone calls, even after the public health specialists had re-purposed the initialization.

Famous for his sartorial daring: Tennis player Roger Federer (b 1981), Wimbledon, July 2023.

A long-standing orthodoxy in fashion is (1) stripes and spots should never be mixed, (2) either should be worn only with a solid and (3) there's the added caveat care should be taken with color choices.  However, neither all stripes nor all spots are created equal; dimensionality matters so if small enough and in the right color combination, either can for these purposes work as solids and thus be available for mix & match.  To illustrate the technique, style guru Elisabeth McKnight explains pattern mixing with polka dots:

(1) Pick a color palette: Black and white is an easy starter palette, but even if adding color, stick to only a few.  Find patterns with the same colors in them or keep it easy by mixing colors of the same tone together (pastels with pastels or jewel tones with jewel tones, for example).

(2) Mix patterns of different scales: Pair a small print with a large and avoid prints of the same size. If using only one print (like a tiny polka dot skirt) with a very small print, essentially it acts as a neutral.  So, when wearing polka dots and stripes together, ensure dots are small if the stripes are bold.  Alternatively, if the print of the stripe is small, it can be paired with bigger dots.  As a rule of thumb, use the “ten foot rule”.  At that distance, to the naked eye, the fabric with small dots or strips should be had to distinguish from a solid.

(3) Mix textures for added dimension: Although it can be a dramatic look, especially with statements like red or purple, interest can be added if different fabrics are used for top and bottom garments.

How it's done: Lindsay Lohan demonstrates how spots and stripes work best with solids.

Shadow

Shadow (pronounced shad-oh)

(1) A dark figure or image cast on the ground or some surface by a body intercepting light.

(2) Shade or comparative darkness, as in an area.

(3) As “the shadows”, darkness, especially that coming after sunset.

(4) A spectre or ghost.

(5) A mere semblance of something.

(6) A reflected image, as in a mirror or in water (now rare and restricted to literary or poetic use).

(7) In painting, drawing, graphics etc, the representation of the absence of light on a form.

(8) In art, the dark part of a picture, either representing an absence of illumination or as a symbolic device.

(9) In architectural depictions & renderings (as “shades and shadows”) a dark figure or image cast by an object or part of an object upon a surface that would otherwise be illuminated by the theoretical light source.

(10) In Jungian psychology, the archetype that represents man's animal ancestors; an unconscious aspect of the personality.

(11) In pop-psychology (1) a period or instance of gloom, unhappiness, mistrust, doubt, dissension, or the like, as in friendship or one's life or (2) a dominant or pervasive threat, influence, or atmosphere, especially one causing gloom, fear, doubt, or the like (often expressed as “shadow of fear”, “shadow of doubt” et al).

(12) A person who follows another in order to keep watch upon that person (in law enforcement, espionage etc).

(13) To overspread with shadow; to shade.

(14) To cast a gloom over; to cloud.

(15) To screen or protect from light, heat, etc; to provide shade.

(16) To follow and observe (a person).

(17) To represent faintly, prophetically etc. (often followed by forth).

(18) In democratic politics, (of or pertaining to a shadow cabinet or shadow minister) a system whereby an opposing politician formally is appointed to be responsible for matters relating to a particular minister’s areas of authority.

(19) As a modifier (shadow ban, shadow ticket, shadow docket, shadow price, shadow inflation etc), something effected unofficially or without public notice; characterized by secrecy or performed in a way that is difficult to detect; a clandestine approach.

(20) In typography, the “drop shadow” effect applied to lettering.

(21) An uninvited guest accompanying one who was invited (an obsolete, Latinism).

(22) In human resource management, the practice of new appointee accompanying an incumbent during the working day, so as to learn the job.

(23) In computer programming, to make (an identifier, usually a variable) inaccessible by declaring another of the same name within the scope of the first.

(24) In computing, in the graphical Workplace Shell (the WPS, successor to the Presentation Manager (PM)) of the OS/2 operating system, an object representing another object.

Pre-900: From the Middle English noun shadwe, shadu, shadue, shadowe shadow, from the Old English sċeaduwe, sċeadwe & sceadu, the oblique case forms of sċeadu (shadow, shade; darkness; protection).  The Middle English verbs were shadwen, shadwe, shadu & shadue (to shade, provide shade, cast a shadow, protect), from the Old English sceadwian (to cover with shadow, protect) (all derivative of the nouns), from the Proto-West Germanic skadu, from the Proto-Germanic skadwaz (shade, shadow), from the primitive Indo-European skeh & ḱeh- (darkness).  Contemporary forms included the Old Saxon skadowan & skadoian and the Gothic (ufar)skadwjan (to (over)shadow).  Similar forms in other Germanic languages included the Old Saxon skado, the Middle Dutch schaeduwe, the Dutch schaduw, the Old High German scato, the German schatten and the Gothic skadus (shadow, shade).  Shadow is a noun, verb & adjective, shadower is a noun, shadowdy, shadowless & shadow-like are adjectives; the noun plural is shadows.

The shadow-box was a protective display case, usually in the form of interlocking squares and wall-mounted was first advertised in 1892.  The term shadow-figure was a synonym of silhouette, dating from 1851.  Eye-shadow was a term invented for the commercial products which came onto the market in 1918, providing a convenient packaged product to achieve the look women (and apparently not a few men) had been creating for thousands of years.  Shadow-boxing was first noted in 1906, an update of the earlier (1768) shadow-fight.  The verb foreshadow (indicate beforehand was a figurative form, the idea apparently of a shadow thrown before an advancing material object as an image of something suggestive of what is to come.  It’s familiar also in the forms foreshadowed & foreshadowing and was used as a noun since at least 1831.  Although the meanings were different, in Old English there was forescywa (shadow) & forescywung (overshadowing).  The adjective shadowy was ultimately from late fourteenth century shadwi & shadewy (full of shadows, shaded (and also “transitory, fleeting, unreal (resembling a shadow)”).  From very late in the eighteenth century it conveyed the sense of “faintly perceptible”.  In The Old English there was sceadwig (shady) and the modern alternative is shadowiness but unfortunately, the marvelously tempting shadowous never caught on.  The noun shadowland came from a work of fiction in 1821 and meant “an abode of ghosts and spirits”, adopted from the early 1920s to mean an indeterminate or unhappy place”.  The noun shadowless was from the 1630s and meant literally “no shadow” the implication being of things ungodly or supernatural.

In idiomatic use shadow often appears.  To be a shadow of one's self is to have suffered some trauma meaning one is a lesser person than before.  One afraid of one’s own shadow is one of a skittish, nervous disposition.  If something is beyond a shadow of a doubt it is something certain.  The old expression sanctuary in the shadow of the church was not exactly literal: to seek sanctuary from the agents of the state by entering a church meant one had to pass through the door.  It referred to the noting that church soil in England was under the authority of the pope in Rome, not the King.  To throw (or cast) a shadow over someone is to seek to deny them visibility; to keep them out of the limelight.

1969 Rolls-Royce Silver Shadow.

In continuous production until 1980, the Rolls-Royce Silver Shadow was introduced in 1965 and with over 30,000 (including the less common but substantially identical Bentley T2 variant) built, it remains the Rolls-Royce made in the greatest volume.  Although there was little about the model which was cutting-edge, it was the first truly modern Rolls-Royce, forsaking the separate chassis, drum brakes and styling which used updated motifs from the 1930s; it was the template with which the company would underpin its products for the rest of century.  Although the huge Phantom V & VI limousines would continue to use a separate chassis until 1990, their annual production was measured (usually at most) in the dozens and it was the Silver Shadow and its derivatives which were the company’s bread and butter.  The adoption of unitary construction meant the end of the line for many specialist coachbuilders and some of the relics of the industry were absorbed by the factory, the Mulliner name still used by Bentley to adorn the even more expensive “special order” vehicles the 1% need to convey the message of wealth something "off the shelf" can’t manage.

1967 Rolls-Royce Silver Shadow two-door saloon by James Young (left) and 1971 two door saloon by Mulliner Park Ward (MPW) (right).

However, on the Silver Shadow platform, James Young, one of the last surviving coachbuilders, did build 35 two-door saloons before the business was shuttered in 1968.  The quirk of the James Young Silver Shadows is truly they were just the standard car with the rear-doors removed and the front units lengthened and it suffered because the competition was the two-door designed by Mulliner Park Ward (MPW) which by then was a specialist division within the factory.  With greater resources and access to all the technical data, the MPW effort was more imaginative and judged universally to be more attractive, its “cow-hip” style (nobody ever suggested using the "cokebottle" appellation Chevrolet & Pontiac had a few years earlier made a trend) carried over when the car was in 1971 re-named Corniche and listed as a regular production model.  The Corniche proved the longest-lived of all the Silver-Shadow family, the convertible (even Rolls-Royce eventually gave up calling such things drophead coupés (DHC)) remaining available until 1996.

Applied with different colors in different ways, eye shadow can achieve various effects.  Lindsay Lohan demonstrates.

The archeological evidence suggests eye shadow is one of humanity’s oldest forms of make-up, worn (usually but not exclusively by women) for thousands of years, and the preparations have included oils and a variety of substances to create the desired colours including minerals & vegetable extracts although charcoal is thought to have been one of the most accessible and popular materials.  The usual rationale for applying eyes shadows is that it’s essentially the same technique as chiaroscuro, a trick used by painters, photographers & film-makers to use real & emulated light and dark to achieve the perception of depth.  Because shadows are inherent to the shape of the eye-socket, eye shadow can be use to accentuate or soften the effect and, if applied with expertise, can even alter perceptions of size and shape.  With a sympathetic choice of shade, the color of the eyes can also be used as a contrast, some taking advantage of colored contact lens to create a look impossible with their natural irises.  Done well, there's no other way to describe the combination of eye shadow and purple contact lens that "eye catching".  Eye shadow can draw attention to the eyes, most trying to make them appear larger, more vibrant, or more expressive.  Despite the name, eye shadow is a flexible product and often used to create a visual illusion on body parts such as the cheeks or décolletage.

Shadow Volumes

Example of shadow mapping with Python summarized by FinFET.

In computer graphics, shadow volume is a technique used to render realistic shadows in three-dimensional (3D) renderings which is employed primarily when dynamic, interactive real-time movement is needed, most obviously in gaming.  Essentially, generating shadow volumes involves determining those addresses in a scene which need to appear as shadows, then rendering them accordingly.  The technique relies on the concept of extruding the boundaries of shadow-casting objects to create a "shadow volume" that represents the space occluded by the object.  In static scenes this was always easy (if once time-consuming) to achieve but when objects nwere moving, until recent decades, the graphics capabilities of computers were insufficient for them to be rendered in anything close to being real-time.  The process essentially is:

(1) Determining shadow casters: The rendering engine identifies objects in the scene capable of casting shadows by calculating the object's position and shape and its relationship to the positions of light sources.

(2) Creating shadow volumes: For each shadow-casting object, the engine constructs a shadow volume based on extending the object's silhouette (defined by the address of the boundaries) in the direction opposite to the light source.  The silhouette is determined by the math of the boundaries viewed from the perspective of the relevant light sources.

(3) Intersecting shadow volumes: The shadow volumes are then intersected with other objects in the scene to determine which parts of those need to be inside or outside the shadow.

(4) Rendering shadows: The shadow volumes are assembled, rendered with darker hues or modified shading techniques to simulate the shadowed regions.

Shadow volumes can be implemented using more than one different algorithm, the most commonly used the z-pass and the stencil buffer.  All techniques are computationally intensive and have been made possible by the advances in the sheer power and complexity of modern graphical processing units (GPUs).

The Microsoft Volume Shadow Copy Service (VSS)

The handy Nirsoft Utilities includes a Shadow Copy viewer.

Microsoft introduced Volume Shadow Copy Service (VSS) with Windows XP (2001).  It worked in conjunction with the High Performance File System (HPFS) and allowed for the creation of point-in-time snapshots or copies of files and volumes on a disk.  What was in 2001 still something of a novelty for most users was the snapshots were taken while the files were in use, enabling access to previous versions or the restoration of files to a specific state, even if they have been been modified or deleted.  The process sequence was:

(1) Snapshot creation: VSS creates a snapshot of a volume or individual files on a disk.  This snapshot represents a "shadow" of the data at a moment in in time.

(2) Copy-on-write mechanism: As files are modified or deleted on the original volume, the VSS utilizes a copy-on-write mechanism.  It stores the original data in the snapshot, allowing users to access the unchanged version while the new changes are written to the live volume.  The lag induced by this can be measured with the appropriate but except with the largest files or on a busy network, it’s not usually something which affects the user.

(3) Shadow copy storage: The shadow copies are stored in a separate location on the disk, typically in a hidden system folder. The storage space occupied by is system-managed by the system, older copies automatically deleted as space is demanded for newer versions.

(4) User accessibility: Users can access the shadow copies through various means, most obviously the "Previous Versions" tab in file properties or the "Previous Versions" feature in Windows Explorer. These interfaces allow users to browse and restore files from a previous point in time.

Shadow copies provided one of the first forms of dynamic file backups for most users and were a convenient form of data recovery without the need of third-party software or external devices.  At scale, similar processes are used by software by companies such as StorageCraft’s ShadowProtect which system administrators can configure in a way that the potential data-losses can be minimized to windows as short as a few minutes.  Combined with off-site backups on large capacity media, it’s still a pest practice approach to data preservation.

Lindsay Lohan's strangely neglected film Among the Shadows (Momentum Pictures, 2019) was also released in some markets as The Shadow Within and it's not known what prompted the change (although there was a film in 2007 called The Shadow Within).  Given the two titles under which the film was distributed have quite different meanings, presumably either the title is incidental to the content or equally applicable.  A dark and gloomy piece about murderous werewolves and EU politicians (two quite frightening species), perhaps both work well and no reviewer appears to have commented on the matter and given the tone of the reviews, it seems unlikely there'll be a sequel to resolve things.

Marquisette

Marquisette (pronounced mahr-kuh-zet or mahr-kwuh-zet)

A lightweight open leno weave fabric of cotton, silk etc; very popular under the Raj.

1907: From the French, diminutive of marquise (a marchioness), from the Medieval Latin marchionissa (feminine form of marchion) from Late Latin marcha, from which Frankish picked up markōn (to mark, mark out, to press with the foot).  The Proto-Germanic was markō (area, region, edge, rim, border).  Marquisette fabric is constructed using a leno weave and was originally made only from silk for use in bridal wear and evening gowns.  More commonly nowadays, it is made from cotton, wool or synthetic fibres and is used for drapes and mosquito nets.  Marquisette, along with voile, was a robing fabric especially suitable for travel and for draping over other dresses.  Early in the twentieth century, Deliniator magazine adopted the light, limp fabric for the newly fashionable directorie look.

Marilyn Monroe, President Kennedy and the marquisette dress

In a marquisette dress, Marilyn Monroe (1926-1962) sang happy birthday Mr President to President John Kennedy (JFK, 1917-1963; US president 1961-1963) at a Democratic Party fundraiser at New York's Madison Square Garden on 19 May 1962, ten days before his actual birthday.  Within three months, she would be dead.

An impressive piece of structural engineering (so body-hugging Ms Monroe had to sewn into it) and an eye-catching design, the dress was cut from a sheer, flesh-colored silk marquisette, adorned with 2500 hand-sewn (and intricately positioned) rhinestones and the famously sultry performance did nothing to dispel rumors the two might be having an affair.  In 1962 it cost US$1,440.33 (equivalent to some US$10,000 in 2022) and it remained part of Ms Monroe's estate until sold at auction by Christie's in 1999 for US$1.3 million.  Subsequently, it was purchased in 2016 for US$4.8 million by Ripley's Believe It Or Not Museum in Florida. 

RFK, Marilyn Munroe & JFK.

The first conceptual sketch of the dress was the debut project of US fashion designer Bob Mackie (b 1939) who two years earlier had left the Chouinard Art Institute to work for French costume designer Jean Louis (1907-1997) and year later, he revealed to Vogue magazine that until the pictures of the Madison Square Garden performance were published, he had no idea of the use to which his sketch was to be put.  Marilyn Munro was certainly aware of the impact the translucent look would have and was seeking a “work-around” to the problem of her employer (Twentieth Century Fox) not permitting her to be dressed too revealing in films.  Having just lost weight and concluded she was looking better than ever, she wanted an outfit with what Mackie called “the wow factor” and that she certainly got.  Sixty years on, dresses which approach functional nudity are commonplace but in 1962 the clinging, shimmering creation which moved with her, caused a sensation.  The garment is also a reminder of the way history unfolds according to the chance interaction of events.  Had JKF not won the 1960 presidential election "by an electoral eyelash", the song would doubtlessly never have been performed.  Marilyn Munroe would not have dressed as she did to sing happy birthday Mr President to Richard Nixon (1913-1994; US president 1969-1974).  

The two superstars of the 1950s.  Maria Callas and Marilyn Monroe, back-stage after the performance.

Remarkably, despite being in the limelight that evening, Ms Monroe purchased five tickets (at US$1000 each) to the event because it was the only way to guarantee her attendance at the private supper which followed.  At the after-party she enjoyed a number turns on the dance floor with the president’s brother, Robert Kennedy (RFK, 1925–1968; US attorney general 1961-1964) although it was reported she left with JFK via a basement corridor and a private elevator to his suite at the next-door Carlyle Hotel, returning the next day to Los Angeles.  There, according to her biographer, she was contacted by one of his aides telling her not to again contact him.  They would never meet again and within three months, she was dead.

At the 2020 Met Gala, Kim Kardashian (b 1980) wore the famous marquisette dress.  It couldn’t be expected to cause quite the same stir as sixty years earlier because, cut from a sheer, silk marquisette that almost exactly matched Ms Monroe’s skin-tone, the 2500 hand-sewn rhinestones were intricately positioned to respond to the particular gait she chose for that evening and, under the limelight in the darkened amphitheater, as she moved, the crystals sparkled and the dress came alive.  It was quite a design.  In the hard, white light of the Met Gala’s red carpet, it couldn’t be expected to work the magic it did all those years ago and, not shimmering in the darkness, it seemed lifeless and perhaps it would have benefited from the contrast her lustrous natural hair would have lent but Ms Kardashian wore it well, attracting admiration (and criticism from the usual suspects) too for the reasonable achievement of shedding some 16 lbs (7¼ kg) in three weeks to ensure a comfortable fit.  Digesting the implications of that, keen-eyed fashionistas noted the vintage white coat which Ms Kardashian kept strategically positioned below the small of her back for the ritual walk to and up the staircase, some taking to Twitter to wonder if it was there to conceal that things were quite fully done-up.

The theory is plausible; it’s always been known that in 1962, Ms Monroe had to be “sewn-into” the dress just before the performance.  The day after the Met Gala, photographs circulated purporting to show Ms Kardashian with a generously sized, pear-shaped lacuna between the seams, accompanied with the accusation that the images showing things done up had been digitally modified and the haters were certainly out, one distressed soul lamenting that for Ms Kardashian to wear the dress "...was an absolute disgrace, a tacky photo opportunity" and that "...one of the most important items of clothing in history, is now tainted with the stain of the Kardashians."  There are people who do take pop-culture very seriously.  The green dress she changed into after her ascent had similar lines (and perhaps slightly more generous dimensions) but was certainly done-up and anyway, in either, she looked gorgeous.

Limelight

Limelight (produced lahym-lahyt)

(1) In the lighting systems of live theatre, prior to the use of electricity, a lighting unit for spotlighting the front of the stage, producing illumination by means of a flame of mixed gases directed at a cylinder of lime and having a special lens for concentrating the light in a strong beam.

(2) The light produced by such a unit (and subsequently by lights using other technology.

(3) In theatre slang (1) a lighting unit (also clipped to “limes”), especially a spotlight & (2) by extension, attention, notice, a starring or central role, present fame (source of the general use of the word).

(4) The center of public attention, interest, observation, or notoriety.

1826:  The construct was lime + light.  Lime (in this context) was from the Middle English lyme, lym & lime, from the Old English līm, from the Proto-Germanic līmaz, from the primitive Indo-European sley- (smooth; slick; sticky; slimy).  It was cognate with the Saterland Frisian Liem (glue), the Dutch lijm, the German Leim (glue), the Danish lim (from the Old Norse lím) and the Latin limus (mud).  In chemistry, the word described any inorganic material containing calcium (usually calcium oxide (quicklime) or calcium hydroxide (slaked lime).  In literary or poetic use, it was used of any gluey or adhesive substance, usually in the sense of “something which traps or captures someone” and sometimes as a synonym for birdlime.  It was used as a verb to mean (1) to apply to some surface a coasting of calcium hydroxide or calcium oxide (lime) & (2) to smear with birdlime or apply limewash.

Light (in this context) was from the Middle English light, liht, leoht, lighte, lyght, & lyghte, from the Old English lēoht, from the Proto-West Germanic leuht, from the Proto-Germanic leuhtą, from the primitive Indo-European lewktom, from the root lewk- (light).  It was cognate with the Scots licht (light), the West Frisian ljocht (light), the Dutch licht (light), the Low German licht (light) and the German Licht (light) and related also to the Swedish ljus (light), the Icelandic ljós (light), the Latin lūx (light), the Russian луч (luč) (beam of light), the Armenian լույս (luys) (light), the Ancient Greek λευκός (leukós) (white) and the Persian رُخش‎ (roxš).  The early uses (in this context) all were related to the electromagnetic radiation in the spectrum visible to the human eye (ie what we still commonly call “light”).  Typically, the human eye can detect radiation in a wavelength range around 400 to 750 nanometers and as scientific understanding evolved, the shorter and longer (ultraviolet light and infrared light) wavelengths, although not visible, were also labeled “light” because, as a matter of physics, they are on the spectrum and whether or not they were visible to the naked eye was not relevant.  “Light” in the sense of illumination was literal but the word was also productive in figurative and idiomatic generation (the “Enlightenment”; “leading light”; “negative light”; “throw a little light on the problem”; “bring to light”; “light the way” et al).  Limelight is a noun & verb, limelighting is a verb, limelighted & limelit are adjectives and limelighter is a noun; the noun plural is limelights.

Lime (chemical formula: CaO) is composed primarily of calcium oxides and hydroxides (typically calcium oxide and/or calcium hydroxide) and the origin of the word lies in its early use as building mortar (because of its qualities of sticking or adhering).  It was the interaction of lime with other substances which lent the concrete mixed in Ancient Rome (known to engineers as “Roman concrete”) unique properties that made it remarkably durable and long-lasting (though despite the legend, it was no more “sticky” that other concrete using the same quantity of lime).  A critical ingredient in Roman concrete was a type of volcanic ash called pozzolana (abundant in the environs of Rome) which was mixed with lime and small rocks or rubble to create a paste that could be molded into various shapes and sizes.  What created uniqueness was the chemical reaction between pozzolana and lime when the mix was exposed to water, this creating a mineral called calcium silicate hydrate, the source of Roman concrete’s durability and strength.  Unusually, it was able to harden underwater and for centuries resist the effects of saltwater (indeed such exposure triggered a kind of “self repair reaction), making it ideal for building structures like harbors and aqueducts and in a happy coincidence, the easy accessibility of pozzolana meant Roman concrete could be produced at a lower cost than other building materials.

The term “limelight dress” was coined to describe a garment designed to attract the eye, making the wearing the “centre of attention” in the manner of a stage performer in the limelight: Rita Ora (left), Ariel Winter (centre) and Lindsay Lohan (right) illustrate the motif.  It's become something less easy to achieve because of the emergence in the past two decades of the "nude dress" and it may be that a more modest cut, if well executed, might work better for clickbait purposes, just because of the novelty.  Of late, “limelight” has also been used in mainstream fashion to refer to dresses made with neon-like fabrics which resemble a color under a bright light.

In the limelight: In a marquisette dress, Marilyn Monroe (1926–1962) sang happy birthday Mr President to President John Kennedy (JFK, 1917–1963; US president 1961-1963) at a Democratic Party fundraiser at New York's Madison Square Garden on 19 May 1962, ten days before his actual birthday.  Within three months, she would be dead.

Limelight was the common name for the Drummond light (or calcium light), a lamp of then unprecedented luminosity created by the burning of calcium oxide (lime).  The process of creating light by burning lime augment by oxygen & hydrogen had been invented in the early 1920s and, generating an intense white light, it was developed in 1925 for use in mining and surveying by Scottish army engineer Captain Thomas Drummond (1797-1840) and soon adopted for lighthouses although it became famous from the use in live theatre where directional spot-lights were used to illuminate the principal actors on stage and although the technology has moved on, in theatre, film & television production, catwalks etc, “limelight” is still often used to describe both the physical lighting equipment and the effect produced.  In popular entertainment, limelight came into use in the UK in the mid-1830s and, cheap to produce and easily exported, were soon in use around the world, even the military finding them useful, the army to assist the targeting of artillery (an early example of applying technology to fire-control systems) and the navy found they were vastly more effective than any other spotlight.  Limelights remained in widespread use until replaced by electric devices in the late nineteenth century but in some far-flung outposts of the British Empire, they were still in use even after World War II (1939-1945).

Lindsay Lohan (1) in the limelight, on stage with Duran Duran, Barclays Center in New York, April 2016 (left) and (2) in the glare, arriving at LA Superior Court, Los Angeles, February 2011 (right) during her "troubled Hollywood starlet" phase.  Although the glare doesn’t carry quite the cachet of the limelight, Ms Lohan illustrated how the catwalk was but a state of mind, pairing a white bandage dress (it’s not clear if wearing the color the Bible associates with purity influenced the judge but channelling the fashion choice of the 24 elders in Revelation 4:4 and the pope may have helped) with a pair of Chanel 5182 sunglasses.  Speculatively, it’s at least possible a strut under the limelight on the catwalk wouldn’t have had the same simulative commercial effect as the stroll to an arraignment, the the US$575 Glavis Albino dress from Kimberly Ovitz's (b 1983) pre-fall collection selling-out worldwide that very day.

From the idea of the character on stage being highlighted by the limelight came the figurative use of the phrase “in the limelight” (noted since 1877) to refer to anyone on whom attention is focused.  This begat the related phrases “steal the limelight”, “bask in the limelight” & “hog the limelight”, all from the world of theatre but later adopted as required just about anywhere (in sport, corporate life etc).  “In the limelight” tends to be used only positively; those who are the focus of attention for reasons such as being accused of committing crimes or some transgression which might lead to cancellation are usually said to be “in the glare”.

1970 Plymouth Hemi 'Cuda in Limelight (left) and 2023 Dodge Challenger SRT Hellcat Redeye Jailbreak in Sublime (right. 

Like the other manufacturers, Chrysler had some history in the coining of fanciful names for colors dating from the psychedelic era of the late 1960s when the choices included Plum Crazy, In-Violet, Tor Red, Limelight, Sub Lime, Sassy Grass, Panther Pink, Moulin Rouge, Top Banana, Lemon Twist & Citron Yella.  Although it may be an industry myth, the story told is that Plum Crazy & In-Violet (lurid shades of purple) were late additions because the killjoy board refused to sign-off on Statutory Grape.  Plymouth called their lime green Limelight while Dodge used Sub Lime.  The lurid shades so associated with the era vanished from the color charts in the mid-1970s, not because of changing tastes but in response to environmental & public health legislation which banned the use of lead in automotive paints; without the additive, production of the bright colours was prohibitively expensive.  Advances in chemistry meant that by the twenty-first century brightness could be achieved without the addition of lead so Dodge revived psychedelia for a new generation although Sub Lime became Sublime.  There was still a price to be paid however, Sublime, Red Octane, Sinamon Stick and Go Mango all costing an additional US$395 while the less vivid shades listed at US$95.