Baby AT

A replacement for the Full AT (Advanced Technology) motherboard and sometimes called BAT, the Baby AT is a motherboard form factor introduced by IBM in 1985. It is used with the 286, 386, 486, and Pentium computers up until the early 1990s. The Baby AT is 8.57" wide x 13.04" deep, almost the same as the original IBM XT motherboard, but with different screw hole positions to fit into AT-style case. The Baby AT is considered obsolete and was replaced by ATX (Advanced Technology eXtended).

AT, ATX, BAT, Computer acronyms, Form factor, Full AT, Motherboard terms, P8 and P9 connector, TLA