TEQ

TEQ is an acronym for:
 * TEQ (TV channel), full name Télévision Ethnique du Québec, now CJNT-DT
 * Time domain equalizer, in Orthogonal frequency-division multiplexing.
 * Tax equalization
 * Terra Est Quaestuosa, an online, text-based real-time strategy game
 * Toxic equivalent (dioxin) for dioxins
 * Tradable Energy Quotas
 * Tekirdağ Çorlu Airport

it may also refer to
 * teq, the international code for the Temein language in ISO 639-3