The original PC launched by IBM in 1981 used Intel's 16-bit 8088 ... Subsequent 32-bit 386, 486 and Pentium CPUs also included a 16-bit operating mode to conform to the original standard in ...

A smaller version of the original AT motherboard used in the IBM PC/AT. Introduced in 1987 ... Widely used in 386, 486 and early Pentium PCs, the Baby AT was superseded by the ATX motherboard.