Certain studies have shown that height is a factor in overall health while some suggest tallness is associated with better cardiovascular health and shortness with longevity. Cancer risk has also been found to grow with height. Moreover, scientists have also observed a protective effect of height on risk for Alzheimers disease, although this fact could be a result of the genetic overlap between height and intracraneal volume and there are also genetic variants influencing height that could affect biological mechanisms involved in Alzheimers disease etiology, such as Insulin-like growth factor 1 (IGF-1).Nonetheless, modern westernized interpretations of the relationship between height and health fail to account for the observed height variations worldwide. Cavalli-Sforza and Cavalli-Sforza note that variations in height worldwide can be partly attributed to evolutionary pressures resulting from differing environments. These evolutionary pressures result in height-related health implications. While tallness is an adaptive benefit in colder climates such as those found in Europe, shortness helps dissipate body heat in warmer climatic regions. Consequently, the relationships between health and height cannot be easily generalized since tallness and shortness can both provide health benefits in different environmental settings. In the end, being excessively tall can cause various medical problems, including cardiovascular problems, because of the increased load on the heart to supply the body with blood, and problems resulting from the increased time it takes the brain to communicate with the extremities. For example, Robert Wadlow, the tallest man known to verifiable history, developed trouble walking as his height increased throughout his life.
light), Israel
OR Books, an American publisher
Owasco River Railway, Auburn, New York, U.S. (by reporting mark)
TUI fly Netherlands, formerly Arke, a Dutch charter airline (by IATA designator)

Language and linguistics
Or (digraph), in the Uzbek alphabet
Or (letter) (or forfeda), in Ogham, the Celtic tree alphabet
Odia language, an ancient Indo-Aryan tongue spoken in East India (ISO 639)
Or, an English grammatical conjunction
-or, an English agent noun suffix
Or, a digraph in Taiwaneses Daī-ghî tōng-iōng pīng-im phonetic transcription

Places
Europe
Or (Crimea), an isthmus of the Black Sea
Or (river), a tributary of the Ural
Province of Oristano, Italy (by vehicle code)

United States
Oregon, a U.S. state (by postal abbreviation)

Science, technology, and mathematics
Computing and mathematics
Or (logic), logical disjunction
Exclusive or (XOR), a logical operation
Bitwise OR, an operator in computer programming, typically notated as or or |
The short-circuit operator or, notated or, ||, or or else
Elvis operator, an operator in computer programming that returns its first operand if its value is considered true, and its right operand if not
Null coalescing operator, an operator in computer programming
Onion routing, anonymous networking technique (also Onion Router)
OR gate, an integrated circuit in electronics
Object-relational mapping

Other uses in science and technology
Odds ratio, a measure of effect size in statistics
OR, a previous title of the Journal of the Operational Research Society
Operating room, in medicine
Operations research, or operational research, in British English
Operations readiness

Titles and ranks
Official receiver, a statutory office holder in England and Wales
Order of Roraima of Guyana, an award of the Republic of Guyana
Other ranks, Denmark (disambiguation), military personnel in all branches of the Danish military that are not officers by the NATO system of ranks and insignia
Other ranks (UK), personnel who are not commissioned officers, usually including non-commissioned officers (NCOs), in militaries of many Commonwealth countries

Other uses
Or (name), Hebrew given name and surname
Official Records of the American Civil War
Olympic record, a term for the best performances in Olympic Games
Or (heraldry), a gold or yellow tincture (from the French word for "gold")
Own Recognizance, the basis for releasing someone awaiting trial without bail

See also
0r (zero r), meaning "no roods", in old measurements of land area
And (disambiguation)
OAR (disambiguation)
Ore (disambiguation)
Either/Or (disambiguation)