TAD (telephone answering device)
TAO (track-at-once)
TAPI (telephone application programming interface)
TCM (Trellis-coded modulation)
TCO (total cost of ownership)
TCP (tape carrier packaging)
TCP/IP (Transmission Control Protocol/Internet Protocol)
TDMA (transparent DMA or time-division multiple access)
TEB (Thin Electronics Bay)
TFT (thin film transistor)
TIFF (tagged image file format)
TIP (Trouble In Paradise)
TLB (translation lookaside buffer)
TPI (tracks per inch)
TSOP (thin small outline package)
TSR (terminate and stay resident)
TTL (transistor-to-transistor logic or through-the-lens)