A foot (plural: feet; abbreviation or symbol: ft or ′ (the prime symbol)) is a unit of length defined as being 0.3048 m exactly and used in the imperial system of units and United States customary units. It is subdivided into 12 inches.

Historically it was also used in a number of other systems of units including those from Ancient Greece, Ancient Rome, English, Scotland and many Continental European countries where its size varied from country to country and in some cases from city to city, but in each was around a quarter to a third of a meter. In most, but not all cases, it was also subdivided into 12 inches. Confusion between the British and French foot led to the myth of Napoleon's shortness.

The United States is the only industrialized nation that uses the international foot (a customary unit of length) and the survey foot in preference to the meter in its commercial and standards activities,^[1]. The foot is still officially used in Canada^[2][3] and still commonly used in the United Kingdom, although the latter has partially metricated its units of measurement.

Definition[link]

International foot[link]

On July 1, 1959, the length of the international yard in the United States and countries of the Commonwealth of Nations was defined as 0.9144 meter. Consequently, the international foot is defined to be equal to exactly 0.3048 meter. This was 2 ppm shorter than the previous U.S definition and 1.7 ppm longer than the previous British definition.^[4]

The international standard symbol for a foot is "ft" (see ISO 31-1, Annex A). In some cases, the foot is denoted by a prime, which is often marked by an apostrophe, and the inch by a double prime; for example, 2 feet 4 inches is sometimes denoted as 2′−4″, 2′ 4″ or 2′4″.

Survey foot[link]

When the international foot was defined in 1959, a great deal of survey data was already available based on the former definitions, especially in the United States and in India. The small difference between the survey and the international foot would not be detectable on a survey of a small parcel, but becomes significant for mapping, or when the state plane coordinate system is used in the US, because the origin of the system may be hundreds of thousands of feet (hundreds of miles) from the point of interest. Hence the previous definitions continued to be used for surveying in the United States and India for many years, and are denoted survey feet to distinguish them from the international foot. The United Kingdom was unaffected by this problem, as the retriangulation of Great Britain (1936–62) had been done in meters.

The United States survey foot is defined as exactly ¹²⁰⁰⁄₃₉₃₇ meter, approximately 0.3048006096 m.^[5] In 1986 the National Geodetic Survey (NGS) released the North American Datum of 1983, which underlies the state plane coordinate systems and is entirely defined in meters. An NGS policy from 1991 has this to say about the units used with the new datum to define the SPCS 83:

In preparation for the adjustment of the North American Datum of 1983, 31 states enacted legislation for the State Plane Coordinate System of 1983 (SPCS 83). All states defined SPCS 83 with metric parameters. Within the legislation, the U.S. Survey Foot was specified in 11 states and the International Foot was specified in 6 states. In all other states the meter is the only referenced unit of measure in the SPCS 83 legislation. The remaining 19 states do not yet have any legislation concerning SPCS 83.^[6]

Since then, 42 states have abandoned the non-metric versions of SPCS 83: 7 states continue to keep location data in survey feet as well as in meters, while one state keeps data in international feet as well as in meters.^[7] State legislation is also important for determining the conversion factor to be used for everyday land surveying and real estate transactions, although the difference (2 ppm) is of no practical significance given the precision of normal surveying measurements over short distances (usually much less than a mile). 24 states have legislated that surveying measures should be based on the U.S. survey foot, 8 have legislated that they be made on the basis of the international foot, and 18 have not specified the conversion factor from metric units.^[7]

The Indian survey foot is defined as exactly 0.3047996 m,^[8] presumably derived from a measurement of the previous Indian standard of the yard. The current National Topographic Database of the Survey of India is based on the metric WGS-84 datum,^[9] which is also used by the Global Positioning System.

Pre-1959[link]

In the United States, the foot was defined as 12 inches, with the inch being defined by the Mendenhall Order of 1893 by 39.37 inches = 1 m. In Imperial units, the foot was defined as ¹⁄₃ yard, with the yard being realized as a physical standard (separate from the standard meter). The yard standards of the different Commonwealth countries were periodically compared with one another.^[10] The value of the United Kingdom primary standard of the yard was determined in terms of the meter by the National Physical Laboratory in 1964 as 0.9143969 m,^[11] implying a pre-1959 foot in the UK of 0.3047990 m.

Obsolete use in different countries[link]

Page from a German Language School Book – 1848^[12]

Metric foot[link]

In 1799 the meter became the official unit of length in France. This was not fully enforced and in 1812 Napoleon introduced the system of mesures usuelles which restored the traditional French measurements in the retail trade, but redefined them in terms of metric units. The foot, or "pied metrique" was defined as one third of a meter. This unit of measure continued in use until 1837.^[13]

Other metric feet were introduced into what is now South Western Germany when, in 1806, the Confederation of the Rhine was founded. Three different reformed feet were defined, all of which were based on the metric system:^[14]

• In Hessen, the Fuß (foot) was redefined as being 25 cm.
• In Baden, the Fuß was redefined as being 30 cm.
• In the Pfalz, the Fuß was redefined as being 33 1/3 cm (as in France).

Other obsolete feet[link]

Prior to the introduction of the metric system, many European cities and countries used the foot, but it varied considerably: the voet in Ieper (Ypres), Belgium was 273.8 millimetres (10.78 in) while the piede in Venice was 347.73 millimetres (13.690 in). A list of conversions between the various units of measure were catalogued in many European reference works including:

• Traite, Paris – 1759^[15]
• Palaiseau – Bordeaux: 1816^[16]
• de Gelder, Amsterdam and s'Gravenhage – 1824^[17]
• Horace, Brussels – 1840^[18]
• Noback & Noback (2 volumes), Leipzig – 1851^[19][20]
• Bruhns, Leipzig – 1881^[21]

Many of these standards were peculiar to a particular city, especially in Germany (which, before German Unification in 1871, consisted of many kingdoms, principalities, free cities and so on). In many cases the conversion factors varied, depending on who took them – for example, the English foot was measured as 11 pouces 2.6 lignes (French inches and lines) by Picard, 11 pouces 3.11 lignes by Maskelyne and 11 pouces 3 lignes by D'Alembert.^[22]

Most of the various feet in this list ceased to be used as the countries concerned adopted the metric system: the Netherlands and modern Belgium adopted the metric system in 1817 having used the mesures usuelles under Napoleon^[23] and newly formed German Empire adopted the metric system in 1871 as its system of measure^[24]

The palm (typically 200 mm to 280 mm) was used in many Mediterranean cities instead of the foot. Horace Doursther, whose reference was published in Belgium which had the smallest foot measurements, grouped both units together, while J.F.G. Palaiseau devoted three chapters to units of length – one for linear measures (palms and feet), one for cloth measures (ells) and one for distances traveled (miles and leagues). In the table below, arbitrary cut-off points of 270 mm and 350 mm have been chosen.

Notes

1. ^ ^{a b c d} The source document used pre-metric French units (pied, pouce and lignes)
2. ^ The original meter was computed using pre-metric French Units
3. ^ The Norweigian fot was defined in 1824 as the length of a (theoretical) pendulum that would have a period ¹²⁄₃₈ s at 45° from the equator
4. ^ Prior to 1835,the pé or foot was not used in Portugal – instead a palm was used. In 1835 the size of the palm was increased from 217.37 mm (according to Palaiseau) to 220 mm
5. ^ The Scots foot ceased to be legal after the Act of Union in 1707

Historical origin[link]

Determination of the length of a rod (which equalled sixteen feet), after a woodcut published in the book Geometrei by Jakob Köbel (Frankfurt, 1570).

Historically the human body has been used to provide the basis for units of length.^[32] The foot of a Caucasian male is about 15.3% of his height,^[33] giving a person of 160 cm (5 ft 3 in) a foot of 245 mm and one of 180 cm (5 ft 10 in) a foot of 275 mm. These figures are less than the foot used in most cities over time, suggesting that the "foot" was actually a synonym for a "shoe".^{[original research?]}

Archeologists believe that the Egyptians, Mesopotamians favoured the cubit while the Romans and the Greeks favoured the foot. Originally both the Greeks and the Romans subdivided the foot into 16 digits, but in later years, the Romans also subdivided the foot into 12 uncia (from which both the English words "inch" and "ounce" are derived). The Greek foot (pous) varied from city to city and ranged between 270 mm and 350 mm, but lengths used for temple construction appear to be about 295 mm and 325 mm, the former being close to the size of the Roman foot. The standard Roman foot (pes) was normally about 295.7 mm, but in the provinces, the pes Drusianus (foot of Nero Claudius Drusus) having a length of about 334 mm was used. (In reality, this foot predated Drusus).^[34]

After the fall of the Roman Empire, some Roman traditions were continued but others fell into disuse. In 790 AD Charlemagne attempted to reform the units of measure in his domains by placing them on a sound basis. His units of length were based on the toise and in particular the toise de l'Écritoire, the distance between the fingertips of the outstretched arms of a man.^[35] The toise has 6 pied (feet) each of 326.6 mm (12.86 in).

He was unsuccessful in introducing a standard unit of length throughout his realm: an analysis of the measurements of Charlieu Abbey shows that during the ninth century, the Roman foot 296.1 mm was used; during its rebuilding in the tenth century, a foot of 320 mm^{[Note 1]} was used. At the same time, monastic buildings used the Carolignian foot of 340 mm.^{[Note 1][36]}

The verification of the foot as described in the 16th century by Jacob Koebel in his book Geometrei. Von künstlichem Feldmessen und absehen is:^[37]

Stand at the door of a church on a Sunday and bid 16 men to stop, tall ones and small ones, as they happen to pass out when the service is finished; then make them put their left feet one behind the other, and the length thus obtained shall be a right and lawful rood to measure and survey the land with, and the 16th part of it shall be the right and lawful foot.

In England[link]

The Roman foot was introduced to Britain in the 1st century AD. The length of the Roman foot has been estimated at 296 mm or 11.65 inches. In the 5th century, the Anglo-Saxons introduced the North German foot of 335 mm (13.2 inches). The new foot was used for land measurement, while the Roman foot continued to be used in the construction crafts. Some time between 1266 and 1303 the weights and measures of England were radically revised by a law known as the Composition of Yards and Perches (Compositio ulnarum et perticarum)^[38] often known as the Compositio for short. This law, attributed to either Henry III or his successor Edward I, instituted a new foot that was exactly 10/11 the length of the old foot, with corresponding reductions in the size of the yard, ell, inch, and barleycorn. Furlongs and rods, however, remained the same. The furlong remained an eighth of a mile, but changed from 600 old feet to 660 new feet. The rod remained the same length, but changed from 15 old feet to 16 1/2 new feet.^[39]

Ordinatum est quod tria grana ordei sicca & rotunda faciunt pollicem, duodecim pollices faciunt pedem, tres pedes faciunt ulnam, quinque ulne & dimidia faciunt perticam, & quiadraginta pertice in longitudine & quatuor in latitudine faciunt unam acram. — Compositio ulnarum et perticarum

See also[link]

• Anthropic units
• English units
• History of measurement
• Imperial units
• Inch
• International System of Units
• Systems of measurement
• United States customary units
• Units of measurement

Notes[link]

1. ^ ^{a b} The original reference was given in a round number of centimeters

References[link]

It has been suggested that Foot type be merged into this article or section. (Discuss) Proposed since August 2009.

Foot
Latin	pes
Artery	dorsalis pedis, medial plantar, lateral plantar
Nerve	medial plantar, lateral plantar, deep fibular, superficial fibular
MeSH	Foot
Dorlands/Elsevier	Foot

The foot (plural feet) is an anatomical structure found in many vertebrates. It is the terminal portion of a limb which bears weight and allows locomotion. In many animals with feet, the foot is a separate organ at the terminal part of the leg made up of one or more segments or bones, generally including claws or nails.

Culture[link]

Humans usually wear shoes or similar footwear covering material for protection from hazards when walking outside. Foot fetishism is the most common form of sexual fetish.^[1][2]

Human foot[link]

Anatomy[link]

The human foot and ankle is a strong and complex mechanical structure containing more than 26 bones, 33 joints (20 of which are actively articulated), and more than a hundred muscles, tendons, and ligaments.^[3]

An anthropometric study of 1197 North American adult Caucasian males (mean age 35.5 years) found that a man's foot length was 26.3 cm with a standard deviation of 1.2 cm.^[4]

The foot can be subdivided into the hindfoot, the midfoot, and the forefoot:

The hindfoot is composed of the talus (or ankle bone) and the calcaneus (or heel bone). The two long bones of the lower leg, the tibia and fibula, are connected to the top of the talus to form the ankle. Connected to the talus at the subtalar joint, the calcaneus, the largest bone of the foot, is cushioned inferiorly by a layer of fat.^[3]

The five irregular bones of the midfoot, the cuboid, navicular, and three cuneiform bones, form the arches of the foot which serves as a shock absorber. The midfoot is connected to the hind- and fore-foot by muscles and the plantar fascia.^[3]

The forefoot is composed of five toes and the corresponding five proximal long bones forming the metatarsus. Similar to the fingers of the hand, the bones of the toes are called phalanges and the big toe has two phalanges while the other four toes have three phalanges. The joints between the phalanges are called interphalangeal and those between the metatarsus and phalanges are called metatarsophalangeal (MTP).^[3]

Both the midfoot and forefoot constitute the dorsum (the area facing upwards while standing) and the planum (the area facing downwards while standing).

The instep is the arched part of the top of the foot between the toes and the ankle.

Skeleton[link]

A human foot; label three is the instep.

• tibia, fibula
• tarsus: talus, calcaneus, cuneiformes, cuboid, and navicular
• metatarsus: first, second, third, fourth, and fifth metatarsal bone
• phalanges

There can be many sesamoid bones near the metatarsophalangeal joints, although they are only regularly present in the distal portion of the first metatarsal bone.^[5]

Arches[link]

The human foot has two longitudinal arches and a transverse arch maintained by the interlocking shapes of the foot bones, strong ligaments, and pulling muscles during activity. The slight mobility of these arches when weight is applied to and removed from the foot makes walking and running more economical in terms of energy. As can be examined in a footprint, the medial longitudinal arch curves above the ground. This arch stretches from the heel bone over the "keystone" ankle bone to the three medial metatarsals. In contrast, the lateral longitudinal arch is very low. With the cuboid serving as its keystone, it redistributes part of the weight to the calcaneus and the distal end of the fifth metatarsal. The two longitudinal arches serve as pillars for the transverse arch which run obliquely across the tarsometatarsal joints. Excessive strain on the tendons and ligaments of the feet can result in fallen arches or flat feet.^[6]

Muscles[link]

The muscles acting on the foot can be classified into extrinsic muscles, those originating on the anterior or posterior aspect of the lower leg, and intrinsic muscles, originating on the dorsal or plantar aspects of the foot.

Extrinsic[link]

Anterior leg muscles.

All muscles originating on the lower leg except the popliteus muscle are attached to the bones of the foot. The tibia and fibula and the interosseous membrane separate these muscles into anterior and posterior groups, in their turn subdivided into subgroups and layers. ^[7]

Anterior group

Extensor group: tibialis anterior originates on the proximal half of the tibia and the interosseous membrane and is inserted near the tarsometatarsal joint of the first digit. In the non-weight-bearing leg tibialis anterior flexes the foot dorsally and lift its medial edge (supination). In the weight-bearing leg it brings the leg towards the back of the foot, like in rapid walking. Extensor digitorum longus arises on the lateral tibial condyle and along the fibula to be inserted on the second to fifth digits and proximally on the fifth metatarsal. The extensor digitorum longus acts similar to the tibialis anterior except that it also dorsiflexes the digits. Extensor hallucis longus originates medially on the fibula and is inserted on the first digit. As the name implies it dorsiflexes the big toe and also acts on the ankle in the unstressed leg. In the weight-bearing leg it acts similar to the tibialis anterior. ^[8]

Peroneal group: peroneus longus arises on the proximal aspect of the fibula and peroneus brevis below it on the same bone. Together, their tendons pass behind the lateral malleolus. Distally, peroneus longus crosses the plantar side of the foot to reach its insertion on the first tarsometatarsal joint, while peroneus brevis reaches the proximal part of the fifth metatarsal. These two muscles are the strongest pronators and aid in plantar flexion. Longus also acts like a bowstring that braces the transverse arch of the foot. ^[9]

Deep and superficial layers of posterior leg muscles

Posterior group

The superficial layer of posterior leg muscles is formed by the triceps surae and the plantaris. The triceps surae consists of the soleus and the two heads of the gastrocnemius. The heads of gastrocnemius arise on the femur, proximal to the condyles, and soleus arises on the proximal dorsal parts of the tibia and fibula. The tendons of these muscles merge to be inserted onto the calcaneus as the Achilles tendon. Plantaris originates on the femur proximal to the lateral head of the gastrocnemius and its long tendon is embedded medially into the Achilles tendon. The triceps surae is the primary plantar flexor and its strength becomes most obvious during ballet dancing. It is fully activated only with the knee extended because the gastrocnemius is shortened during knee flexion. During walking it not only lifts the heel, but also flexes the knee, assisted by the plantaris.^[10]

In the deep layer of posterior muscles tibialis posterior arises proximally on the back of the interosseous membrane and adjoining bones and divides into two parts in the sole of the foot to attach to the tarsus. In the non-weight-bearing leg, it produces plantar flexion and supination, and, in the weight-bearing leg, it proximates the heel to the calf. flexor hallucis longus arises on the back of the fibula (i.e. on the lateral side), and its relatively thick muscle belly extends distally down to the flexor retinaculum where it passes over to the medial side to stretch across the sole to the distal phalanx of the first digit. The popliteus is also part of this group, but, with its oblique course across the back of the knee, does not act on the foot. ^[11]

Intrinsic[link]

On the back (top) of the foot, the tendons of extensor digitorum brevis and extensor hallucis brevis lie deep to the system of long extrinsic extensor tendons. They both arise on the calcaneus and extend into the dorsal aponeurosis of digits one to four, just beyond the penultimate joints. They act to dorsiflex the digits. ^[12]

Plantar aspects of foot, varying depths (superficial to deep)

Similar to the intrinsic muscles of the hand, there are three groups of muscles in the sole of foot, those of the first and last digits, and a central group:

Muscles of the big toe: abductor hallucis stretches medially along the border of the sole, from the calcaneus to the first digit. Below its tendon, the tendons of the long flexors pass through the tarsal canal. It is an abductor and a weak flexor, and also helps maintain the arch of the foot. flexor hallucis brevis arises on the medial cuneiform bone and related ligaments and tendons. An important plantar flexor, it is crucial for ballet dancing. Both these muscles are inserted with two heads proximally and distally to the first metatarsophalangeal joint. Adductor hallucis is part of this group, though it originally formed a separate system (see contrahens.) It has two heads, the oblique head originating obliquely across the central part of the midfoot, and the transverse head originating near the metatarsophalangeal joints of digits five to three. Both heads are inserted into the lateral sesamoid bone of the first digit. Adductor hallucis acts as a tensor of the plantar arches and also adducts the big toe and then might plantar flex the proximal phalanx. ^[13]

Muscles of the little toe: Stretching laterally from the calcaneus to the proximal phalanx of the fifth digit, abductor digiti minimi form the lateral margin of the foot and is the largest of the muscles of the fifth digit. Arising from the base of the fifth metatarsal, flexor digiti minimi is inserted together with abductor on the first phalanx. Often absent, opponens digiti minimi originates near the cuboid bone and is inserted on the fifth metatarsal bone. These three muscles act to support the arch of the foot and to plantar flex the fifth digit. ^[14]

Central muscles of foot

Central muscle group: The four lumbricales arise on the medial side of the tendons of flexor digitorum longus and are inserted on the medial margins of the proximal phalanges. Quadratus plantae originates with two slips from the lateral and medial margins of the calcaneus and inserts into the lateral margin of the flexor digitorum tendon. It is also known as flexor accessorius. Flexor digitorum brevis arise inferiorly on the calcaneus and its three tendons are inserted into the middle phalanges of digits two to four (sometimes also the fifth digit). These tendons divide before their insertions and the tendons of flexor digitorum longus pass through these divisions. Flexor digitorum brevis flexes the middle phalanges. It is occasionally absent. Between the toes, the dorsal and plantar interossei stretch from the metatarsals to the proximal phalanges of digits two to five. The plantar interossei adducts and the dorsal interossei abducts these digits and are also plantar flexors at the metatarsophalangeal joints. ^[15]

Medical aspects[link]

Due to their position and function, feet are exposed to a variety of potential infections and injuries, including athlete's foot, bunions, ingrown toenails, Morton's neuroma, plantar fasciitis, plantar warts and stress fractures. In addition, there are several genetic disorders that can affect the shape and function of the feet, including a club foot or flat feet.

This leaves humans more vulnerable to medical problems that are caused by poor leg and foot alignments. Also, the wearing of shoes, sneakers and boots can impede proper alignment and movement within the ankle and foot. For example, High-heeled footwear are known to throw off the natural weight balance (this can also affect the lower back). For the sake of posture, flat soles and heels are advised.

A doctor who specializes in the treatment of the feet practices podiatry and is called a podiatrist. A pedorthist specializes in the use and modification of footwear to treat problems related to the lower limbs.

Fractures of the foot include:

• Lisfranc fracture — in which one or all of the metatarsals are displaced from the tarsus^[16]
• Jones fracture] — a fracture of the fifth metatarsal
• March fracture] — a fracture of the distal third of one of the metatarsals occurring because of recurrent stress
• Calcaneal fracture

Foot sweat is the major cause of foot odor. Sweat itself is odorless, but it creates a beneficial environment for certain bacteria to grow and produce bad-smelling substances.

Evolutionary variations[link]

A paw is the soft foot of a mammal, generally a quadruped, that has claws or nails. A hard foot is called a hoof.

Depending on style of locomotion, animals can be classified as plantigrade (sole walking), digitigrade (toe walking), or unguligrade (nail walking).

The metatarsals are the bones that make up the main part of the foot in humans, and part of the leg in large animals or paw in smaller animals. The number of metatarsals are directly related to the mode of locomotion with many larger animals having their digits reduced to two (elk, cow, sheep) or one (horse). The metatarsal bones of feet and paws are tightly grouped compared to, most notably, the human hand where the thumb metacarpal diverges from the rest of the metacarpus. ^[17]

See also[link]

Footnotes[link]

References[link]

• France, Diane L. (2008). Human and Nonhuman Bone Identification: A Color Atlas. CRC Press. ISBN 1-4200-6286-7. http://books.google.com/?id=Z-C1jKNgjmQC&pg=PA532. 
• Marieb, Elaine Nicpon; Hoehn, Katja (2007). Human anatomy & physiology. Pearson Education. ISBN 0-321-37294-8. http://books.google.com/?id=x1uEB68iitwC. 
• Platzer, Werner (2004). Color Atlas of Human Anatomy, Vol. 1: Locomotor System (5th ed.). Thieme. ISBN 3-13-533305-1. 
• "Anatomy of the foot and ankle". Podiatry Channel. http://www.podiatrychannel.com/anatomy/index.shtml. Retrieved August 2009. 

External links[link]

Wikimedia Commons has media related to: Foot

Look up foot in Wiktionary, the free dictionary.

• Foot at the Open Directory Project

v t e Human regional anatomy (TA A01.1) Head Forehead · Ear · Jaw · Face (Cheek, Eye, Nose, Mouth, Chin) · Occiput · Scalp · Temple Neck Throat · Adam's apple Trunk Chest (Breast) · Abdomen (Navel) · Back · Pelvis (Sex organs) Limbs Upper limb Shoulder · Axilla · Arm Elbow · Forearm Wrist · Hand · Finger (Thumb · Index · Middle · Ring · Little) Lower limb/ (see also leg) Hip · Buttocks · Thigh Knee · Calf · Crus Ankle · Heel · Foot · Toe (Hallux · Long  • Third  • Fourth  • Fifth) · Sole General anatomy: systems and organs, regional anatomy, planes and lines, superficial axial anatomy, superficial anatomy of limbs

Look up unit in Wiktionary, the free dictionary.

Unit may refer to:

Mathematics[link]

• Unit (ring theory), an element that is invertible with respect to ring multiplication
• 1 (number), the unit number
• Unit vector, a vector with length equal to 1

Science and technology[link]

• Units (software), a software program for unit conversion
• Units of measurement, a standardized quantity of measurement of a physical quantity
• Enzyme unit
• Unit operation, a basic step in a chemical plant process
• Functional unit, a component of a computer system such as the CPU
• Unit of blood, a measurement in blood transfusion equal to one pint or 450 ml
• Unit of alcohol, 10 millilitres of pure ethanol in the United Kingdom
• Rack unit, a measure to describe the height of rack-mounted computer equipment
• Geological unit or rock unit, a volume of identifiable rock or ice
• In statistics:
  • Unit of observation, a type of entity (e.g. person, house, neighborhood) specifying the level at which data is collected
  • Unit of analysis, a type of entity (e.g. person, house, neighborhood) specifying the level at which data is analyzed
  • Statistical unit, a single data point, or collection of data points grouped as a single entity, on which statistical analysis is performed

Entertainment and the arts[link]

• UNIT, a fictional military organization in the science fiction television series Doctor Who
• Unit (album), by the Australian band Regurgitator
• Unit (art collective), a British artists' collective
• G-Unit, a hip-hop music group
• The Units, a synthpunk band
• The Unit, an American television series
• Second unit, a team that shoots footage which is of lesser importance for the final motion picture
• Unit of action, a discrete piece of action (or beat) in a theatrical presentation
• UNIT Post Production, a British company
• The Tony Rice Unit, an American bluegrass group

Other uses[link]

• Unit (housing), a self-contained suite of rooms within a set of similar dwellings
• Unit of account, a monetary unit of measurement
• An apartment
• Multiple unit, a passenger train where each carriage has it own motors
• Military unit
• Strategic business unit
• In real time strategy games, an individual (or squad, depending on the game) infantry or vehicle
• Work unit or danwei (单位), a place of employment in China

See also[link]

• UNITA
• Subunit (disambiguation)

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