1T

1T may refer to:
 * One-T, a French electronic musical project
 * 1T-SRAM, a type of pseudostatic random-access memory
 * 1T DRAM, a type of Dynamic random-access memory
 * SSH 1T, alternate designation for Washington State Route 501
 * 1T-TaS2, the only transition-metal dichalcogenide known to develop the Mott phase
 * 1T, a model of Chevrolet Chevette
 * 1-T, a synthetic anabolic–androgenic steroid