Taw, tav, or taf is the twenty-second and last letter of the Semitic abjads, including Arabic tāʾ ت, Aramaic taw 𐡕, Hebrew tav ת, Phoenician tāw 𐤕, and Syriac taw ܬ. In Arabic, it also gives rise to the derived letter ث ṯāʾ. Its original sound value is /t/. It is related to the Ancient North Arabian 𐪉, South Arabian 𐩩, and Ge'ez ተ.
The Phoenician letter gave rise to the Greek tau (Τ), Latin T, and Cyrillic Т.