T or t is the 20th letter in the modern English alphabet and the ISO basic Latin alphabet. Its name in English is (pronounced ), plural tee tees. It is derived from the Semitic letters  taw (?, ?, ?) via the Greek letter ? ( tau). In English, it is most commonly used to represent the voiceless alveolar plosive, a sound it also denotes in the International Phonetic Alphabet. It is the most commonly used consonant and the second most common letter in English-language texts. 
was the last letter of the Western Taw Semitic and Hebrew alphabets. The sound value of Semitic Taw, Greek alphabet T ( Tau), Old Italic and Latin T has remained fairly constant, representing in each of these; and it has also kept its original basic shape in most of these alphabets.
Use in writing systems
In English, ⟨t⟩ usually denotes the
voiceless alveolar plosive ( International Phonetic Alphabet and X-SAMPA: ), as in tart, tee, or ties, often with aspiration at the beginnings of words or before stressed vowels.
The digraph ⟨ti⟩ often corresponds to the sound
/?/ (a voiceless palato-alveolar sibilant) word-medially when followed by a vowel, as in nation, ratio, negotiation, and Croatia.
The letter ⟨t⟩ corresponds to the affricate
/t/ in some words as a result of yod-coalescence (for example, in words ending in "-ture", such as future).
digraph is ⟨th⟩, which usually represents a dental fricative, but occasionally represents /t/ (as in Thomas and thyme.)
orthographies of other languages, ⟨t⟩ is often used for /t/, the voiceless dental plosive /t?/, or similar sounds.
International Phonetic Alphabet, ⟨ t⟩ denotes the voiceless alveolar plosive.
Ancestors and siblings in other alphabets ? :
Semitic letter Taw, from which the following symbols originally derive
? ? : Greek letter Tau
? ? : Coptic letter Taw, which derives from Greek Tau ? ? :
Cyrillic letter Te, also derived from Tau
? : Gothic letter tius, which derives from Greek Tau ? : Old Italic T, which derives from Greek Tau, and is the ancestor of modern Latin T
? : Runic letter teiwaz, which probably derives from old Italic T ? : One of the 26 consonantal letters of Ge'ez script. The Ge'ez abugida developed under the influence of Christian scripture by adding obligatory vocalic diacritics to the consonantal letters. Pesa ? is based on Tawe ?.
Derived signs, symbols and abbreviations
LATIN CAPITAL LETTER T
LATIN SMALL LETTER T Encodings
Numeric character reference T
EBCDIC family 227
ASCII 1 84
1 Also for encodings based on ASCII, including the DOS, Windows, ISO-8859 and Macintosh families of encodings.
Oxford English Dictionary, 2nd edition (1989); Merriam-Webster's Third New International Dictionary of the English Language, Unabridged (1993); "tee", op. cit.
Lewand, Robert. "Relative Frequencies of Letters in General English Plain text". Cryptographical Mathematics. Central College. Archived from the original on 2008-07-08 . Retrieved .
Constable, Peter (2003-09-30). "L2/03-174R2: Proposal to Encode Phonetic Symbols with Middle Tilde in the UCS" (PDF).
Constable, Peter (2004-04-19). "L2/04-132 Proposal to add additional phonetic characters to the UCS" (PDF).
Everson, Michael (2006-08-06). "L2/06-266: Proposal to add Latin letters and a Greek symbol to the UCS" (PDF).
Everson, Michael; et al. (2002-03-20). "L2/02-141: Uralic Phonetic Alphabet characters for the UCS" (PDF).
Ruppel, Klaas; Aalto, Tero; Everson, Michael (2009-01-27). "L2/09-028: Proposal to encode additional characters for the Uralic Phonetic Alphabet" (PDF).
Cook, Richard; Everson, Michael (2001-09-20). "L2/01-347: Proposal to add six phonetic characters to the UCS" (PDF).
Everson, Michael; Jacquerye, Denis; Lilley, Chris (2012-07-26). "L2/12-270: Proposal for the addition of ten Latin characters to the UCS" (PDF).
Media related to T at Wikimedia Commons
The dictionary definition of at Wiktionary T The dictionary definition of at Wiktionary t