7400 may refer to:
Years A.D. 7400, a year in the 8th millennium CE 7400 BCE, a year in the 8th millennium BC
Electronics and computing Texas Instruments 7400-series integrated circuits PowerPC 7400 CPU chip MITS 7400 scientific and engineering calculator
Other uses 7400 Lenau, an asteroid in the Asteroid Belt, the 7400th asteroid registered 7400 (District of Kolonjë), one of the postal codes in Albania GWR 7400 Class locomotives
See also
List of 7400-series integrated circuits