Tommy Bahama

The company sells these products through its own chain of retail outlets, and through other retailers. The numeric character references in HTML and XML are "U" and "u" for upper and lower case respectively. Tommy Bahama is a clothing manufacturer that designs and makes Hawaiian shirts and other tropical wear. The EBCDIC code for capital U is 228 and for lowercase u is 164. The ASCII code for capital U is 85 and for lowercase u is 117; or in binary 01010101 and 01110101, correspondingly. In Unicode the capital U is codepoint U+0055 and the lowercase u is U+0075.

The use of the two forms to distinguish the consonants and vowels which they now represent was not standardised until modern times. U was originally a positional variant of the letter V, as J was of I, 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. U is the twenty-first letter of the modern Latin alphabet. In Internet slang, "u" or "U" is referred to as "you" due to the similarity in pronunciation.

University of Utah or "U of U" (or just University in general). University of Miami, owing to its distinctive split-U logo. In the Unicode standard, character code points are labelled "U+" followed by a number in hexadecimal. They were also referred to as "U-boats" by the Allies.

In military science, U- is a prefix used for German submarines during World War II, (e.g., U-20), which was short for Unterseeboot. In metrology, u is the symbol for unified atomic mass unit. In mathematics, U stands for the unitary group. A U-set is a set of uniqueness.

In mathematics, stands for union and the upside-down stands for intersection (both are operators on sets). U also stands for the popular Shia name Umar as Umar is seen as too sacred to be said aloud. 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 linguistics, U refers to speech markers of upper class British speakers.

In history, U is king of Goryeo (Korea). In electrical engineering, U is the symbol for voltage. In education, U is an unsatisfactory grade. 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 communication, u is an abbreviation for the word "you" in SMS or instant message. In chemistry, U is the symbol for uranium. In calendars, U is often an abbreviation for Sunday, for use when S is being used for Saturday. In biochemistry, U is the symbol for uracil.