T is the twentieth letter of the modern Latin alphabet.

Tâw was the last letter of the Western Semitic alphabet - and of the Hebrew alphabet. The sound value of Semitic Taw, Greek alphabet Tαυ (Tau), and Etruscan alphabet and Latin T was /t/.

Tango represents the letter T in the NATO phonetic alphabet.

T is also:

• The symbol for tritium, an isotope of hydrogen.
• A symbol for the SI derived unit for magnetic flux density, the tesla.
• The symbol t for tonne, which equals 1000 kilograms, for measuring mass.
• The variable t commonly used for time.
• In the form of The T, a shorthand name for the Massachusetts Bay Transportation Authority (MBTA).
• The stock symbol for AT&T.

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