The grapheme Ť (minuscule: ť) is a letter in the Czech and Slovak alphabets used to denote /c/, the voiceless palatal plosive (precisely alveolo-palatal), the sound similar to British English t in stew. It is formed from Latin T with the addition of háček; minuscule (ť) has háček modified to apostrophe-like stroke instead of wedge.

T-cedilla (majuscule: Ţ, minuscule: ţ) is a letter which is part of the Gagauz alphabet, used to represent the Gagauz language sound , the voiceless alveolar affricate (like ts in bolts like the letter C in Slavic languages). It is written as the letter T with a cedilla below and it has both the lower-case (U+0163) and the upper-case variants (U+0162).

1. True. A Lisp compiler by Johnathan A. Rees in 1982 at Yale University. T has static scope and is a near-superset of Scheme. Unix source is available. T is written in itself and compiles to efficient native code. Used as the basis for the Yale Haskell system. Maintained by David Kranz <kranz@masala.lcs.mit.edu>. Latest version: 3.1. ftp://ftp.ai.mit.edu/pub/systems/t3.1. A multiprocessing version of T is available ftp://masala.lcs.mit.edu/pub/mult. Runs on Decstation, SPARC, Sun-3, Vax under Unix, Encore, HP, Apollo, Macintosh under A/UX. E-mail: <t3-bugs@cs.yale.edu> (bugs). E-mail: <t-project@cs.yale.edu>. (1991-11-26) ["The T Manual", Johnathan A. Rees <jar@zurich.ai.mit.edu> et al, Yale U, 1984]. 2. A functional language. ["T: A Simple Reduction Language Based on Combinatory Term Rewriting", Ida et al, Proc of Prog Future Generation Computers, 1988]. 3. (lower case) The Lisp atom used to represent "true", among other things. "false" is represented using the same atom as an empty list, nil. This overloading of the basic constants of the language helps to make Lisp {write-only code}. 4. In transaction-processing circles, an abbreviation for "transaction". 5. (Purdue) An alternative spelling of "tee".