T (or t) is the 20th letter of the modern English Latin alphabet, pronounced "tee" (/ˈtiː/), and derived from the Semitic letter Taw via Greek tau (τ).3

Key Facts

• Phonetics: In English, it typically represents the voiceless alveolar plosive /t/ (as in tart or tee), the most common consonant and second-most frequent letter in English texts. It can also form digraphs like ⟨th⟩ (dental fricative), ⟨ti⟩ (/ʃ/ as in nation), or affricates like /t͡ʃ/ in future due to yod-coalescence.3
• Usage: Appears in brands like T-Mobile (telecom with 5G and satellite plans)1, T-Series (India's largest music label on YouTube)2, Twitch (livestreaming for gaming and entertainment, often stylized with T)5, TXT (K-pop group Tomorrow X Together, as in their "Can't Stop" MV)6, and ITU-T (UN telecom standards body).4