Rack

Rack (pronounced rak)

(1) A framework of bars, wires, or pegs on which articles are arranged or deposited.

(2) A fixture containing several tiered shelves, often affixed to a wall.

(3) A vertical framework set on the sides of a wagon and able to be extended upward for carrying hay, straw, or the like in large loads.

(4) In certain cue sports (pool, snooker), a frame of triangular shape within which the balls are arranged before play; the balls so arranged.

(5) In butchery & cooking, the rib section of a fore-saddle of lamb, mutton, pork or veal (historically used also of the neck portion).

(6) In nephology (the branch of meteorology concerned with cloud formation, structure, classification, and dynamics), as “cloud rack”, a group of drifting clouds.

(7) In machinery, a bar, with teeth on one of its sides, adapted to engage with the teeth of a pinion rack and pinion or the like, as for converting circular into rectilinear motion or vice versa (nest known as the “rack & pinion” steering apparatus used in motor vehicles.

(8) An instrument of torture consisting of a framework on which a victim was tied, often spread-eagled, by the wrists and ankles, to be slowly stretched by spreading the parts of the framework; there were many variations.

(9) As “on the rack”, originally a reference to the torture in progress, later adopted figuratively to describe a state of intense mental or physical suffering, torment, or strain.

(10) In equestrian use, the fast pace of a horse in which the legs move in lateral pairs but not simultaneously (the “horse's rack”).

(11) In military use, a fixed (though sometimes with some scope for movement for purposes of aiming), a framework fixed to an aircraft, warship or vehicle and used as a mounting for carrying bombs, rockets, missiles etc.

(12) In zoology, a pair of antlers (more commonly used of wall mounted trophies (eight-point rack etc)).

(13) In slang, ruin or destruction (a state or rack).

(14) In slang, a woman's breasts (often with a modifier).

(15) In slang, a large amount of money (historically a four-figure sum).

(16) In military, prison and other institutional slang, a bed, cot, or bunk.

(17) In slang, to go to bed; go to sleep.

(18) In slang, to wreck (especially of vehicles).

(19) In slang, as “to rack up”, a sudden or dramatic increase in the price of goods or services.

(20) In slang, to tally, accumulate, or amass, as an achievement or score (often expressed as “racked up”).

(21) In vinification (wine-making), to draw off (wine, cider etc) from the lees (to “rack into” a clean barrel).

(22) To torture; acutely to distress or torment (often expressed as “racked with pain”).

(23) To strain in mental effort (often expressed as “racked her brain”).

(24) To strain by physical force or violence; to strain beyond what is normal or usual.

(25) To stretch the body of a victim in torture by the use of a rack.

(26) In nautical use, to seize two ropes together, side by side:

(27) In cue sports, as “rack 'em up”, to place the balls on the tales in the correct spot with the use of a rack.

1250–1300: From the Middle English noun rakke & rekke, from the Middle Dutch rac, rec & recke (framework) and related to the Old High German recchen (to stretch), the Old Norse rekja (to spread out), the Middle Low German reck and the German Reck.  The use to mean “wreck” dates from the late sixteenth century and was a phonetic variant of the earlier wrack, from the Middle English wrake, wrache & wreche, a merging of the Old English forms wracu & wræc (misery, suffering) and wrǣċ (vengeance, revenge).  Except as a literary or poetic device (used to impart the quality of “vengeance; revenge; persecution; punishment; consequence; trouble”) or in some dialects to mean “ruin, destruction; a wreck”), wrack is now archaic.  The equestrian use (the fast pace of a horse in which the legs move in lateral pairs but not simultaneously (the “horse's rack”)) dates from the 1570s and the origin is obscure but it may have been a variant of “rock” (ie the idea of a “rocking motion”).  Nephology (the branch of meteorology concerned with cloud formation, structure, classification, and dynamics) adopted “cloud rack” (a group of drifting clouds) from mid-fourteenth century use in Middle English where the original spellings were rak, recke & reck, from the Old English wrǣc (what is driven) and related to the Gothic wraks (persecutor) and the Swedish vrak.  The use in vinification (wine-making), describing the process of drawing off (wine, cider etc) from the lees (to “rack into” a clean barrel) dates from the mid fifteenth century and was from the Old Provençal arraca , from raca (dregs of grapes), ultimately from the by then obsolete Old French raqué (of wine pressed from the dregs of grapes).  The use in butchery & cooking (the rib section of a fore-saddle of lamb, mutton, pork or veal (historically used also of the neck portion)) dates from the mid sixteenth century and is of uncertain origin but was probably based upon either (1) the cuts being placed on some sort or rack for preparation or (2) having some sort or resemblance to “a rack”.  Rack is a noun & verb, racker is a noun, racking is a noun, verb & adjective, racked is a verb and rackingly is an adverb; the noun plural is racks.

Racking them up: Lindsay Lohan playing snooker.

In idiomatic use, the best known include “racking one’s brains” (thinking hard), “going to rack and ruin” (to decay, decline, or become destroyed”, “on the rack” (originally a reference to the torture in progress, later adopted figuratively to describe a state of intense mental or physical suffering, torment, or strain) and “racked with pain” (again an allusion to the consequences of being “racked” “on the rack”).  The “rack” as a description of a woman’s breasts is one in a long list of slang terms for that body part and dictionaries of slang are apparently divided on where it’s the breasts, genitals or buttocks which have provided the most inspiration for the creation of such forms.  The Australian slang “rack off” is an alternative to the many other forms popular in the country used to mean “please go away” including “sod off”, “piss off”, “fuck off”, “bugger off” etc; depending on context and tone of voice, these can range from affectionate to threatening.

Luggage rack & ski rack page in the 1968 Chrysler Parts Accessories Catalog (left) and promotional images for the 1968 Chrysler Town and Country (right).  Because the full-sized US station wagons could be fitted with a third seat in the back compartment (thus becoming eight-seaters), the roof-rack was sometime an essential fitting.

In transport, luggage racks were among the earliest “accessories” in that they were additions to hand & horse-drawn carts and carriages which enabled more stuff to be carried without reducing the passenger-carrying capacity.  There were “roof racks” and “trunk racks”, both there for the purpose of carrying trunks, secured usually with leather straps.  The most obvious carry-over to motorized vehicles was the roof-rack, still a popular fitting and still sometimes fitted as standard equipment to certain station wagons (estate cars).

1972 De Tomaso Pantera.

Although it wouldn’t have been something the designer considered, the mid-engined De Tomaso Pantera (1971-1992) had a rear section so suited to the provision of a luggage rack that Gran Turismo (a after-market accessories supplier) produced one which was as elegant as any ever made.  Because of the location directly behind the rear window, when loaded it obviously would have restricted rearward visibility so in certain jurisdictions doubtlessly it would have been declared unlawful but it one lives somewhere more permissive, it remains a practical apparatus.  Ironically, the Pantera had probably the most capacious frunk (a front mounted trunk (boot)) ever seen in a mid-engined sports cars and one easily able to accommodate the luggage the car’s two occupants were likely to need for a weekend jaunt.  Even if superfluous however, in the collector market it’s an interesting period piece and well-designed; easily removed for cleaning, the four mounting brackets remain affixed to the deck lid.

1973 Chrysler Newport two-door hardtop (left) and 1973 Triumph Stag (right).

Larger cars of course carried more than two and if they travelled over distances, usually they carried luggage.  The full-sized US cars of the early 1970s were very big and had a lot of trunk space but many, with bench seats front and rear were configured as genuine six-seaters and that could mean a lot of luggage.  Accordingly, both the manufacturers and after-market suppliers in the era offered a range of luggage racks.  Upon debut, the lovely but flawed Triumph Stag (1970-1978) was a much-praised design which offered the pleasure of open-air motoring with the practicality of four seats (although those in the rear were best suited for children) but the sleek, low lines did mean trunk space was not generous and luggage racks were a popular fitting.

1959 Austin-Healey Sprite (left) and 1971 Chevrolet Corvette Convertible LS5 454/365 (right).

There have been cars (and not all of them were sports cars) with no trunk lid.  In the case of the Austin-Healey Sprite (1958-1971), the lack of the structure on the early versions (1958-1961) was a cost-saving measure (the same rationale that saw the planned retractable headlights replaced by the distinctive protuberances atop the hood (bonnet) which lent the cheerful little roaster its nickname (bugeye in North American and frogeye in the UK & most of the Commonwealth).  It had additional benefits including weight reduction and improved structural rigidity but the obvious drawback was inconvenience: to use the trunk one had to reach through the gap behind the seats.  It was easy to see why luggage racks proved a popular accessory, sales of which continued to be strong even when later versions of the Sprite (1961-1971) and the badge-engineered companion model the MG Midget (1961-1980) gained a trunk lid.  Curiously, the Chevrolet Corvette between 1953-1962 did have a trunk lid but when the second generation was released for the 1953 model year, it was removed from the specification and not until the fifth generation in 1998 did the return.  By then, the moment of the Corvette luggage rack had passed but in the early 1970s they were still often fitted and in the modern collector market, it’s one of those accessories, the very sight of which seems to upset some.

Variations of the theme: ski rack (left), bike rack (centre) and surfboard rack (right).  The luggage rack had proved an adaptable platform and specialist versions are available for many purposes but in many cases the same basic structure can be used as a multi-purpose platform with “snap-on” fittings used to secure objects of different shapes.  The Porsche 911 was an early favorite on the ski fields because of the combination of and air-cooled engine and the rear-engine/rear wheel drive configuration which provided good traction in icy conditions.

Markers of the state of civilization: Gun rack in the back window of pickup truck (left) and silver plate toast rack by Daniel & Arter of Birmingham, circa 1925 (right).

The toast rack has been in use since at least the 1770s and, like the butter knife, is one of the markers of civilized life.  That aside, their functionality lies in the way they provide a gap between the slices, allowing water vapour to escape, preventing it condensing into adjacent slices and making them soggy while also maintaining a buffer of warm air between so the cooling process is slowed.  In the way of such things, there have over the years been design ranging from the starkly simple to the extravagant but the some of the most admired are those from the art deco era of the inter-war years.

The gun rack in the back of a pickup truck is now a classic MAGA (Make America Great Again) look but the devices have been in use for decades and were always popular in rural areas with a tradition of hunting.  Whether such things are lawful depends on the jurisdiction.  In the US, some states have an “open carry” law which means one is free to carry certain firearms unconcealed and this includes gun racks which are similarly unrestricted; in states where an “open carry” permit is required, a separate permit is required for a gun rack to be used in a vehicle while in jurisdictions with no “open carry” legislation, gun racks are also banned except for those able to obtain a specific exemption.  So, it can be that travelling across state lines can involve some additional effort, even if one is authorized to carry a firearm in both placed.  Usually, this demands the weapon being unloaded and encased in an area inaccessible to both driver and passengers.

The rack as a marker of the state of civilization: Cuthbert Simpson, Tortured on the Rack in the Tower of London (1558), published in from Old England: A Pictorial Museum (1847) and reprinted in The National And Domestic History Of England by William Aubrey (circa 1890).

The most famous of the many apparatus of torture which proliferated during the Middle Ages (and beyond), the rack was an interrogation tool which remained in use until the eighteenth century.  Although the rack is most associated with the Spanish Inquisition, it was popular also in England as a device to extract confessions to various crimes, especially heresy.  The designers were imaginative and racks were produced in many forms including vertical devices and wheels but the classic version was a flat, bed-like structure, made with an open, rectangular wooden frame with rollers or bars at each end to which the wrists and ankles of the accused (or “the guilty” as often they were known) were secured.  The rollers moved in opposite directions by the use of levers, and the victim’s joints slowly and painfully were separated.

RACK is used as an acronym, one being “Random Act of Conditionless Kindness” which seems not substantively different from the better known “random act of kindness” although presumably it imparts some depth of emphasis, given “random acts of conditional kindness” may be a more commonly observed phenomenon.  In certain sub-sets of the BDSM (Bondage, Discipline (or Dominance) & Submission (or Sadomasochism) community, RACK means either “Risk-Aware Consensual Kink” or “Risk-Accepted Consensual Kink).  Both describe a permissive attitude towards conduct which is to some degree “risky”, undertaken on the basis of “a voluntary assumption of risk”.  In that it differs from the tastes of BDSM’s SSC (Safe, Sane & Consensual) sub-set which restricts it proclivities to things “not risky”.  The RACK practitioners acknowledge the difficulties inherent in their proclivities, what they do not a distinction between “safe” & “unsafe” but rather “safer” and “less safe” (ie degrees of danger).  What this means is that in extreme cases there are potential legal consequences because while the implication or RACK is that one can “contract out” of the statutory protections usually available in such interactions, in the case of serious injury or death, the usually legal principles would apply.

Trunk

Trunk (pronounced truhngk)

(1) The main stem of a tree, as distinct from the branches (limbs) and roots (also as bole; tree trunk).

(2) Of, relating to or noting a main channel or line, as of a railroad, waterway or something which assumes a similar shape (topographically).

(3) A large, sturdy box or chest for holding or transporting clothes, personal effects or other articles.  Such trunks usually have a hinged (sometimes domed) lid and handles at each end, provided because such is the size & weight, it takes at least two to carry one when loaded.

(4) A compartment, most often in the rear coachwork of an automobile, in which luggage, a spare tire, and other articles may be kept (a “boot” in the UK and certain other places in the English-speaking world and a “dicky” in India and elsewhere in South Asia).

(5) A storage compartment fitted behind the seat of a motorcycle and known also as a top-ox or top-case (as distinct from a “pannier” or “saddlebag” which is fitted at the side (usually in pairs), below the level of the seat).

(6) In anatomy, the body of a person or an animal excluding the head and limbs (the torso).

(7) In pathology, the main body of an artery, nerve, or the like, as distinct from its branches.

(8) In ichthyology, that part of a fish between the head and anus.

(9) In engineering and architecture, a name for a conduit, shaft, duct, channel or chute etc, used variously for airflow (thermal or blown), water, coal, grain etc.

(10) In steam engines, a large pipe forming the piston rod of a steam engine, of sufficient diameter to allow one end of the connecting rod to be attached to the crank, and the other end to pass within the pipe directly to the piston, thus making the engine more compact.

(11) In extractive mining, a flume or sluice in which ores are separated from the slimes in which they are contained.

(12) In architecture, the dado or die of a pedestal.

(13) In architecture, the part of a pilaster between the base and capital, corresponding to the shaft of a column.

(14) In hydrology, the main channel, artery or line in a river, railroad, highway, canal or other tributary system.

(15) In telephony, a telephone line or channel between two central offices or switching devices that is used in providing telephone connections between subscribers generally (also called a “tie-line”).

(16) In telegraphy, a telegraph line or channel between two main or central offices.

(17) In telecommunications, to provide simultaneous network access to multiple clients by sharing a set of circuits, carriers, channels or frequencies.

(18) In clothing, brief shorts (loose-fitting or tight) worn by men chiefly for boxing, swimming and athletics (some historically known as “trunk hose”.

(19) In zoology, the elongated prehensile, flexible, cylindrical nasal appendage of the elephant and certain other creatures (the proboscis).

(20) In nautical use, a large enclosed passage through the decks or bulkheads of a vessel, used as air ducting for purposes of heating, cooling, ventilation and such.

(21) In shipbuilding, any of various watertight casings in a vessel, as the vertical one above the slot for a centerboard in the bottom of a boat.

(22) A long tube through which pellets of clay, peas etc are driven by the force of the breath; a peashooter (archaic).

(23) In software engineering, the most current source tree, from which the latest unstable builds (so-called “trunk builds”) are compiled.

1400–1450: From the late Middle English tronke & trunke, from the Old French tronc (alms box, tree trunk, headless body), from the Latin truncus (stem, a stock, lopped tree trunk), a noun use of the adjective truncus (lopped; cut off, maimed, mutilated), (the later related to the English truncated).  Trunk & trunking are nouns & verbs, trunkful is a noun, trunked is a verb & adjective and trunkless is an adjective; the noun plural is trunks.

There are a myriad of “truck” terms in human pathology and other derived phrases include “elephant's trunk” (rhyming slang for “drunk”), “hand trunk” (a piece of luggage smaller than the traditional trunk and able to be carried by one), “junk in one's trunk” (corpulence of the buttocks, the alternative forms being “dump truck” or the vernacular “fat ass”), “the apple does not fall far from the trunk” (a variant of “the apple/pear etc does not fall far from the tree”) (children tend in appearance & characteristics to resemble their parents), “trunklid” (literally obviously “the lid of a trunk” and used of the opening panel which provides access to a car’s trunk), “bootlid” the UK equivalent and confusingly in the US used also as “decklid” on the basis of the trunk being a part of a car’s “rear deck”), “trunk novel” (a novel abandoned by the author while still a project), “trunk or treat” (an organized alternative to trick-or-treating where candy is handed out to children from cars in a parking lot; it was introduced as a child safety measure), “trunk show” (an event in which vendors present merchandise directly to store personnel or customers at a retail location or other venue, based on the idea of selling “out of a trunk”), “trunk sale” (and event at which goods are displayed for sale in the trunks of cars), “boot sale” the companion term)), “trunking” (travelling sitting in the trunk of a car”), and “trunk shot” (in film-making, a cinematic shot from within a car trunk (although there was a case of a serial killer who shot his victims while concealed in the trunk of a car.

Louis Vuitton Trunk #5 (left) and Louis Vuitton Trunk on Fire (right) by Tyler Shields (b 1982).

The original idea of a trunk being a “box; case etc” may lie in the first such “trunks” being hollowed-out tree trunks although some suggest the post-classical development of the meaning “box, case with a lid or top” was based on the notion of human body’s trunk being a “case” in which the organs were transported.  The modern idea of a “luggage compartment of a motor vehicle” dates from circa 1930, about the time trunks cease to be something separately carried and replaced by and space for luggage integrated into the bodywork.  The use of trunk had long been familiar in the medical literature (both of the torso and blood vessels etc) and the idea was by 1843 extended to railroad trunk lines and telephone networks by 1889.  “Trunk-hose” were first sold in the 1630s and seems to have been a kind of thermal underwear, the description a reference to them covering the whole torso (ie, the trunk) as opposed to most “hose” which was for the lower limbs.

The use of trunk to describe the “long snout of an elephant (or other beast with a similar appendage)” appeared first in the 1560s but etymologists are divided on whether it was an allusion to a tree’s trunk or has some connection with “trumpet”, based on the loud sound elephants are able to generate although the evidence does suggest the early use as a reference to the thing’s ability to hold water.  Predictably, by the early eighteenth century, it was a slang term for the human nose.  The use in clothing (always in the plural as “trunks”) emerged in the mid 1820s and initially described “short breeches of thin material”; it was a use of trunk in the sense of “torso”.  Use began in theatrical jargon but, as was not uncommon, soon it was applied to breeches generally, especially in US English and for the short, tight-fitting breeches worn by swimmers and other sporting types, adoption was close to universal by the 1890s.  “Swimming trunks” has survived as a regionalism; even within the one country, there are often several different names for what is one of humanity’s most simple garments.

Trump Trunks: MAGA (Make America Great Again) swimming trunks.  Trump trunks are made from a “silky, breathable, 4-way stretch mesh fabric” and features include (1) a small internal pocket, (2) a built-in anti-chafe liner.  The country of manufacture is not disclosed.  Clearly, the DNC (Democratic National Committee) in 2016 missed an opportunity by failing to release the "Crooked Hillary Clinton Bikini".

One linguistic curiosity was “subscriber trunk dialing” (later changed to “subscriber toll dialing” which later still switched to DDD (Direct Distance Dialing).  The “other” use of STD was as “sexually transmitted disease”, previously known as VD (venereal disease) and it wasn’t until the 1970s the initialism 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 service (for long-distance phone calls) to DDD, 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.  In clinical use, STI “Sexually Transmitted Infection” seems now the preferred term).

The evolution of the trunk: 1851 Concord stagecoach on display at the Smithsonian's National Postal Museum, Washington DC (left) with truck strapped to the back, additional trunks carried on the roof; 1928 Mercedes-Benz Nürburg 460 K Pullman Limousine (W08, centre left) with separate trunk still carried on a rear frame; 1936 Studebaker Dictator 4-door sedan (centre right) with the trunk now an integrated part of the bodywork; The US full-sized cars of the era had most capacious trunks but few could match Leyland Australia's infamous P76 (1973-1975, right) which effortlessly could carry a 44 (imperial) gallon (209 litre) drum.

The compartment which is most located in the rear coachwork of an automobile is used for luggage and historically also the spare tyre a toolkit (neither now not always supplied).  In North American use, this is called a “trunk”, an inheritance from the time when the passengers’ trunks (ie, in the sense of the box-like suitcases) were strapped on to an extension at the back of horse-drawn carriages.  In the early automobiles, the practice continued (often with lined wicker baskets because they were of lightweight construction) and when these were integrated into the bodywork, the space provided continued to be called “the trunk”.  The British called the same thing a “boot”.  In horse-drawn carriages in the UK, a “boot” was a compartment used to store travel essentials, among which (in an age of rutted, poorly maintained roads) included boots, the male passengers sometimes required to push the coach when it became stuck in mud, the frequent inclusion of a “boot box” or “boot locker”, made typically of leather and attached at the rear.  The other suggested origin is the French boute (compartment; box).  The term “boot” thus spread throughout the British Empire although, under the Raj, in India & Ceylon (later Sri Lanka) it became the “dickie”.  That was based on the dicky seat (also as “dickie seat” & “dickey seat” and later more commonly known as the “rumble seat”), an upholstered bench mounted at the rear of a coach, carriage or early motorcar and as the car industry evolved and coachwork became more elaborate, increasingly they folded into the body.  The size varied but generally they were designed to accommodate one or two adults although the photographic evidence suggests they could be used also to seat half-a-dozen or more children.  Why it was called a dicky seat is unknown (the word dates from 1801 and most speculation is in some way related to the English class system) but when fitted on horse-drawn carriages it was always understood to mean “a boot (box or receptacle covered with leather at either end of a coach, the use based on the footwear) with a seat above it for servants”.  Under the Raj, “dickie” was preferred while the colloquial “mother-in-law seat” was at least trans-Atlantic and probably global.

Lindsay Lohan illustrates how there are trunks and there are frunks:  The rear-engined Porsche 911 Carrera (997, 2004-2013) cabriolet (Los Angeles, 2012, right) has a frunk while the front-engined Mercedes-Benz SL 550 (R230, 2001-2011) (Los Angeles, 2009, left) has a trunk.  The R230 range was unusual because of the quirk of the SL 550 (2006-2011), a designation used exclusively in the North American market, the RoW (rest of the world) cars retaining the SL 500 badge even though both used the 5.5 litre (333 cubic inch) V8 (M273).

The Fiat X1/9 (produced by Fiat 1972–1982 and Bertone from 1982–1989, centre) featured both a frunk (left) and a trunk (right.

Most cars built have had the engine mounted in the front, thus most trunks appeared in the rear bodywork.  There have however been cars with engines behind the driver (such things were quite numerous until well into the 1970s) and these usually had a storage compartment at the front (where the engine otherwise would sit, under the hood (bonnet)).  Until the early years of the twentieth century, these seem just to have been called a “trunk” or “boot” but as electric vehicles began to appear in volume “frunk” (the construct being f(ront) + (t)runk) and the less popular “froot” (the construct being fr(ont) + (b)oot)) came into use.  There have been mid-engined cars which have both a trunk and a frunk and those in the diminutive Fiat X1/9 were surprisingly large while others (such as Ferrari's Dino 308 GT4 (1973-1980) & 208 GT4 (1975-1980), both badged as Ferraris after 1976) were of a less generous capacity, the frunk in the Dinos most suited to storing something the size of a topless bikini but it was a genuine four-seater (2+2), something not often attempted with the mid-engined configuration.

Decker

Decker (pronounced dek-er)

(1) Something (typically a bus, ship, aircraft, bed, sandwich et al), having a specified number of decks, floors, levels, layers and such (used usually in combination with a numerical or other expression indicating the number in the construction (double decker, triple decker, upper decker, five decker etc (sometimes hyphenated).

(2) As “table decker” an employee who “decks” (ie sets or adorns) a table used for entertaining (used also as a “coverer”) (archaic).  The idea lives on in the verb “bedeck” (to adorn).

(3) In boxing slang, a fighter with a famously powerful punch, able to “deck” an opponent (ie knock them to the canvas with a single punch).

(4) In historic naval slang, as “quarter-decker”, a label applied to officers known more for their attention to matters of etiquette or trivial regulations than competent seamanship or ability in battle.  It was an allusion to a warship’s “quarter deck” (the part of the spar-deck of a man-of-war (warship) between the poop deck and main-mast (and originally (dating from the 1620s), a smaller deck above the half-deck, covering about a quarter of the vessel’s LOA (length overall)).  In many navies, the quarter-deck was reserved as “a promenade for officers only”.

1785–1795: The construct was deck + -er.  Deck in this context was from the Middle English dekke (covering extending from side to side over part of a ship), from a nautical use of the Middle Dutch decke & dec (roof, covering), from the Middle Dutch decken, from the Proto-Germanic thakam (source also of the noun “thatch” and from the primitive Indo-European root steg & teg- (to cover) and the Old Dutch thecken, from the Proto-West Germanic þakkjan, from the Proto-Germanic þakjaną and related to the German Decke (covering, blanket).  The –er suffix was from the Middle English –er & -ere, from the Old English -ere, from the Proto-Germanic -ārijaz, thought most likely to have been borrowed from the Latin –ārius where, as a suffix, it was used to form adjectives from nouns or numerals.  In English, the –er suffix, when added to a verb, created an agent noun: the person or thing that doing the action indicated by the root verb.   The use in English was reinforced by the synonymous but unrelated Old French –or & -eor (the Anglo-Norman variant -our), from the Latin -ātor & -tor, from the primitive Indo-European -tōr.  When appended to a noun, it created the noun denoting an occupation or describing the person whose occupation is the noun.  The noun double-decker was first used in 1835 of ships with two decks above the water line and this extended to land transport (trains) in 1867.  Decker is a noun & adjective; the noun plural is deckers.

Flight deck of the US Navy's Nimitz-class aircraft carrier USS Carl Vinson (CVN 70).

The reason ships, trains, buses, aircraft and such have "decks" while buildings have "floors” or “stories (or storeys)” is traceable to nautical history and the nomenclature used in shipbuilding.  English picked up “deck” from the Middle Dutch decke & dec (roof, covering) where the use had been influenced by the Old Norse þekja (to cover) and in early shipbuilding, a “deck” was the structure which covered the hull of the ship, providing both a horizontal “working surface” and enclosing the vessel, creating a space for stores, cargo or accommodation which was protected from the elements.  In that sense the first nautical decks acted as a “roof”.  As ships became larger, the nautical architects began to include multiple decks, analogous with the floors of buildings in that they fulfilled a similar function, providing segregated layers (ie the storeys in buildings) used for cannons, crew quarters, storage and such.  As the terminology of shipbuilding became standardized, each deck came to have a specific name depending on its purpose or position (main deck, flight deck, poop deck, gun deck etc).

Ford Mustang convertible (1965–1973) replacement floor pan (complete, part number 3648B) by Moonlight Drive Sheet Metal.

Until the nineteenth century, although the vehicles used on land became larger, they tended to get longer rather than higher but the advent of steam propulsion made possible trains which ran on railways and these could pull carriages carrying freight or passengers.  The first “double decker” versions appeared in France in 1867 and were described as voitures à imperial, (imperial cars) were used on the Chemin de Fer de l'Ouest (Western Railway), the upper deck roofless and thus an “open-air experience”,  Rapidly, the idea spread and double-deck carriages became common for both long-distance and commuter services.  An outlier in the terminology is car design; cars have a floor (sometimes called the “floor pan”) rather than a deck, presumably because there’s only ever one.  In the narrow technical sense there have been cars with “two floors” but they were better understood as a “double-skinned” single floor and they were used for armor or to provide a space for something specialized such as hydrogen fuel-cells, the technique often called “sandwich construction”.

Boeing 314 Clipper flying boat cutaway (left) and front schematics of Boeing 747-300 (right).  Re-using some of an earlier design for a bomber which failed to meet the military’s performance criteria, between 1938-1941, Boeing built twelve 314 Clippers, long-range flying boats with the range to cross both the Atlantic and Pacific oceans.  Although used by the military during World War II, most of their service was with the two commercial operators Pan Am (originally Pan American Airways) and BOAC (British Overseas Airways Corporation).  Very much a machine of the pre-war age, the last Clippers were retired from service between 1946-1948, the advances in aviation and ground infrastructure built during war-time rendering them obsolete and prohibitively expensive to maintain.

Because train designers adopted the nautical terminology, it naturally came to be used also in buses, and aircraft, the term “flight deck” (where the pilot(s) sat) common even before multiple decks appeared on flying boats and other long-distance airframes.  The famous “bubble” of the Boeing 747 (1968-2023) remains one of the best known decks and although most associated with the glamour of first-class international travel, was designed originally as a freight compartment.  The multi-deck evolution continued and the Airbus A380 (2005-2021) was the first “double decker” with two passenger decks extending the full length of the fuselage (with cargo & baggage) carried in the space beneath hence the frequent description of the thing as a “triple decker”.

Lindsay Lohan contemplating three decker sandwich, now usually called a “club sandwich”.  Many menus do specify the number of decks in the clubs.

Deck widely was used of many raised flat surface which people could walk or stand upon (balcony, porch, patio, flat rooftop etc) and came to be used of the floor-like covering of the horizontal sections or compartments, of a ship, a use later extended to land transport (trains, busses etc) and in the twentieth century, to aircraft.  A pack or set of playing cards can be called a deck as (less commonly), can the dealt cards which constitute the “hand” of each player and the notion was extended to sets of just about anything vaguely similar (such as a collection of photographic slides). , Because slides tended to be called a “deck” only when in their magazine, this influenced the later use in IT when certain objects digitally were assemble for storage or use and in audio and video use when cartridges or cassettes were loaded into “tape decks”.  In print journalism, a deck is a headline consisting of one or more full lines of text (applied especially to a sub-headline).  The slang use in the trade of illicit narcotics to describe the folded paper used for distributing drugs was a US regionalism.  There are dozens of idiomatic and other uses of deck, the best known including “all hands on deck”, “swab the decks”, “hit the deck” “clear the decks”, “deck-chair”, “deckhand”, “deck shoes”, “flight deck”, “gun deck”, “observation deck”, “play with a full deck”, “promenade deck”, “re-arranging the deck chairs on the Titanic”, “decked out”, “stack the deck”, “sun deck”, “top deck” & “to deck someone”.

Schematic of the Royal Navy’s HMS Victory, a 104-gun first-rate ship of the line, laid down in 1759 and launched in 1765, most famous as the flagship of Admiral Lord Nelson’s (1758-1805) flagship at the Battle of Trafalgar on 21 October 1805; it was on her Nelson was killed in battle.  Uniquely, after 246 years on the active list, she is the world's oldest naval vessel still in commission.  Although the term wasn’t in use until the 1830s, Victory was a “five decker” configured thus:

Orlop Deck: The lowest deck, mainly used for storage and ship's equipment.
Lower Gun Deck: The deck housing the heaviest cannons.
Middle Gun Deck: This deck contained another set of guns, slightly lighter than those on the lower gun deck.
Upper Gun Deck: The third level of guns, with even lighter cannons.
Quarterdeck and Forecastle: The uppermost decks, where the captain and officers usually directed the ship during battle.

The early meanings in English evolved from “covering” to “platform of a ship” because of the visual similarity and it’s thought the idea of a deck being a “pack of cards” (noted in the 1590s) was based on them being stacked like the decks of a multi-deck man-of-war (warship).  The tape-deck was first so described in 1949 an was a reference to the flat surface of the old reel-to-reel tape recorders.  The first deck chairs were advertised in 1844, an allusion to the use of such thing on the decks of passenger ocean liners and deck shoes were those with sturdy rubber soles suitable for use on slippery surfaces; the modern “boat shoes” are a descendent.  The old admiralty phrase “clear the decks” dated from the days of the tall-masted warships (the best known of which was the big “ship-of-the-line”) and was a reference to the need to remove from the main deck the wreckage resulting from an attack (dislodged masts, sails, spas etc) to enable the battle to be rejoined without the obstructions.  Being made of wood, the ships were hard to sink but highly susceptible to damage, especially to the rigging which, upon fragmentation, tended to fall to the deck.  It may have been a adaptation of the French army slang débarasser le pont (clear the bridge).

Ford 302 cubic inch (4.9 litre) Windsor V8 with the standard deck (left) and the raised deck 351 (5.8) (right).  In production in various displacements between 1961-2000, the 221 (3.6), 255 (4.2), 260 (4.3), 289 (4.7) & 302 (4.9) all used what came retrospectively to be called the “standard deck” while the 351 (5.8) was the sole “raised deck” version.

For decades, it was common for US manufacturers to increase the displacement of their V8 engines but means of creating a “raised deck” version, the process involving raising the height of the engine block's deck surface (the surface where the cylinder heads bolt on).  What this allowed was the use of longer connecting rods while using the original heads and pistons which in combination with a “longer stroke crankshaft” increases the displacement (the aggregate volume of all cylinders).  The industry slang for such things was “decker” and the technique was used with other block configurations but is best known from the use in the 1960s & 1970s for V8s because it’s those which tend to be fetishized.  The path to greater displacement lay either in lengthening the stroke or increasing the bore (or a combination of the two) and while there were general engineering principles (longer stroke=emphasis on more torque at the cost of reducing maximum engine speed and bigger bore=more power and higher engine speeds) but there were limitations in how much a bore could safely be increased including the available metal.  A bigger bore (ie increasing the internal diameter of the cylinder) reduces the thickness of the cylinder walls and if they become too thing, there can be problems with cooling, durability or even the structural integrity of the block.  The piston size also increases which means the weight increases and thus so too does the reciprocating mass, increasing friction, wear and has the potential to compromise reliability, especially at high engine speeds.

Increasing the stroke will usually enhance the torque output, something of greater benefit to most drivers, most of the time than the “top end power” most characteristic of the “big bore” approach.  In street use, most engines spend most time at low or mid-range speed and it’s here a longer stroke tends to produce more torque so it has been a popular approach and the advantage for manufacturers is that creating a “decker” almost always is easier, faster and cheaper than arranging one which will tolerate a bigger bore, something which can demand a new block casting and sometimes changes to the physical assembly line.  With a raised deck, there can be the need to use different intake and exhaust manifolds and some other peripheral components but it’s still usually a cheaper solution than a new block casting.  Ford’s “thinwall” Windsor V8 was one of the longest-serving deckers (although the raised-deck version didn’t see out the platform’s life, the 351 (introduced in 1969) retired in 1997).  Confusingly, during the Windsor era, Ford also produced other 351s which belonged to a different engine family.  Ford didn’t acknowledge the biggest Windsor's raised deck in its designation but when Chrysler released a decker version of the “B Series” big-block V8 (1958-1978), it was designated “RB” (Raised B) and produced between 1959-1979.

1964 AEC Routemaster double decker Bus RM1941 (ALD941B) (left), two sightseeing AEC Routemasters in Christchurch, New Zealand (centre) and one of the "new" Routemasters, London 2023 (right).

London’s red, double-decker busses are one of the symbols most associated with the city and a fixture in literature, art and films needing something with which to capture the verisimilitude.  The classic example of the breed was the long-running AEC Routemaster, designed by the London Transport Board and built by the Associated Equipment Company (AEC) and Park Royal Vehicles.  The Routemaster entered service in 1956 and remained in production until 1968, changed over those years in many details but visually there was such continuity that it takes an expert (and buses are a thing so experts there are) to pick the model year.  They entered service in 1956 and remained in regular service until 2005 although some were retained as “nostalgia pieces” on designated “tourist” routes until COVID-19 finally saw their retirement; since then, many have been repurposed for service around the world on sightseeing duties and other tourist projects.

Boris Johnson (b 1964; UK prime-minister 2019-2022) will leave an extraordinary political legacy which in time may came to be remembered more fondly than it now may appear but one of his most enduring achievements is likely to be the “New Routemaster” which had the typically bureaucratic project name “New Bus for London” but came to be known generally as the “Boris Bus”, the honor accorded by virtue of him championing the idea while serving as Lord Mayor of London (2008-2016).  In truth, the original Routemaster, whatever its period charm, was antiquated years before it was withdrawn from service and although the doorless design made ingress and egress convenient, it was also dangerous and apparently a dozen passenger fatalities annually was not uncommon.  The Borisbus entered service in 2012 and by 2024 almost 1200 were in service.

1930 Lancia Omicron with 2½ deck coachwork and a clerestoried upper windscreen (left) and a “three decker” bus in Pakistan (right).

The Lancia Omicron was a bus chassis produced between 1927-1936; over 600 were built in different wheelbase lengths with both two and three-axle configurations.  Most used Lancia's long-serving, six-cylinder commercial engine but, as early as 1933, some had been equipped with diesel engines which were tested in North Africa where they proved durable and, in the Sudan, Ethiopia, Libya and Algeria, once petrol powered Omicron chassis were being re-powered with diesel power-plants from a variety of manufacturers as late as the 1960s.  Typically of bus use, coachbuilders fabricated many different styles of body but, in addition to the usual single and double deck arrangements, the Omicron is noted for a number of two and a half deck models, the third deck configured usually as a first-class compartment but in at least three which operated in Italy, they were advertised as “smoking rooms”, the implication presumably that the rest of the passenger compartment was smoke-free.  History doesn't record if the bus operators were any more enthusiastic about or successful in enforcing smoking bans than the usual Italian experience.  For a variety of reasons, busses with more than 2.something decks were rare and the Lancias and Alfa Romeos which first emerged in the 1920s were unusual.  However, the famously imaginative and inventive world of Pakistani commerce has produced a genuine “three decker” bus, marketed as the “limousine bus”.  What the designer did was take a long-distance, double decker coach and use the space allocated usually as a luggage compartment to configure as the interior of a long wheelbase (LWB) limousine, thereby creating a “first class” section, the four rows of seating accessible via six car-like (ie limousine) doors.