U
From Free net encyclopedia
Template:AZU is the twenty-first letter of the modern Latin alphabet. Its English name is pronounced Template:IPA.
U was originally a positional variant of the letter V, as I was of J, used only in lower-case writing and only medially, and representing both the vowels now written with U and the consonants now written with V. The use of the two forms to distinguish the consonants and vowels which they now represent was not standardised until modern times.
Codes for computing
{{Letter |NATO=Uniform |Morse=··– |Character=U |Braille=⠥ }} In Unicode the capital U is codepoint U+0055 and the lowercase u is U+0075.
The ASCII code for capital U is 85 and for lowercase u is 117; or in binary 01010101 and 01110101, correspondingly.
The EBCDIC code for capital U is 228 and for lowercase u is 164.
The numeric character references in HTML and XML are "U" and "u" for upper and lower case respectively.
Meanings for U
- In astronomy,
- U stands for the planet Uranus; for example, S/2001 U 2 was the second satellite of Uranus sighted in 2001, Ferdinand.
- U stands for an October 16 through 31 discovery, in the provisional designation of a comet (e.g. P/2005 U1, Comet Read 3) or asteroid (e.g. (4425) 1967 UQ).
- In biochemistry, U is the symbol for uracil. It is also the symbol for enzyme unit, a standard measure of amount of a particular enzyme.
- In calendars, U is often an abbreviation for Sunday, for use when S is being used for Saturday.
- In chemistry, U is the symbol for uranium.
- In commerce, a circled U, Ⓤ, on a food product indicates kosher certification.
- In communication, u is an abbreviation for the word "you" in SMS or instant messages.
- In computing:
- 1 U (= 44 mm or 1.75 inch) is a standard unit of height of a piece of equipment or computer chassis in a 19-inch rack, also called a rack unit (RU) or a pizza box.
- In the C and [[C++]] programming languages, an integer literal may be suffixed with an uppercase U to indicate that it should be interpreted as an unsigned quantity.
- In education, U is an unsatisfactory grade.
- In electrical engineering, U is the symbol for voltage.
- In geosciences, U stands for the theoretical geopotential, and U-shaped for glaciated valleys
- In history, U is king of Goryeo (Korea).
- In linguistics, U refers to speech markers of upper class British speakers. British novelist Nancy Mitford brought to popular attention the linguistic terminology "U" and "non-U" to indicate the speech markers of upper class and non-upper class British speakers respectively.
- In Burmese, U is an honorific roughly equal to Mister.
- U also stands for the popular Shia name Umar as Umar is seen as too sacred to be said aloud.
- In mathematics, <math>\cup</math> stands for union and the upside-down <math>\cap</math> stands for intersection (both are operators on sets). A U-set is a set of uniqueness.
- In mathematics, U stands for the unitary group.
- In metrology, u is the symbol for unified atomic mass unit.
- In military science, U- is a prefix used for German submarines during World War II, (e.g., U-20), which was short for Unterseeboot. They were also referred to as "U-boats" by the Allies.
- In physics, U is the symbol for potential energy.
- In the SI system (the metric system),
- u is a nonstandard way of writing the SI prefix mu (μ), denoting 10-6 = 0.000001 (one millionth), and pronounced as micro. This is commonly done in computer programs or computer systems without international font support, where the lowercase u glyph is the closest ASCII approximation to the μ glyph.
- In television engineering, particularly in the PAL encoding system, U is one of the two subcarrier-modulated color-difference channels in the YUV colorspace.
- In the Unicode standard, character code points are labelled "U+" followed by a number in hexadecimal.
- The U, nickname for several Universities.
- In Internet slang, "u" or "U" is referred to as "you" due to the similarity in pronunciation.
- In Sports, U is also a common nickname for Universitario de Deportes, one of the most popular soccer teams in Peru.
See also
Template:AZsubnavals:U bs:U ca:U cs:U da:U de:U el:U eo:U es:U fi:U fr:U (lettre) gl:U he:U hr:U it:U ja:U ko:U kw:U la:U nl:U nn:U no:U pl:U pt:U ro:U simple:U sl:U sn:U sv:U vi:U yo:U zh:U