IDT

IDT may refer to:
*IDT Corp., a long-distance telephone carrier
*Infant-directed talk, the distinctive mode of speech adults adopt when addressing infants
*Integrated Device Technology, a semiconductor manufacturer
*Intelligent design
*Interdigital transducer, also called "interdigitated transducer", a sensor and transmitter for a surface acoustic wave
*International Display Technology Ltd., a joint-venture of IBM and the Taiwanese Chi Mei group
*Interrupt descriptor table, a memory structure of x86 microprocessors
*It Dies Today, a metalcore band from Buffalo, New York
*Israel Daylight Time
*Interactive Digital Technology, a workforce core technology group in animation, interactive web development, game development, virtual world development