alternative, and there was no compelling reason for them to cooperate on a new standard. Because of this, when the first 386-based system (the Compaq Deskpro 386) was sold in 1986, it still supported 16-bit slots. Other 386 PCs followed suit, and the AT (later ISA) bus remained a part of most systems even into the late 1990s.

Meanwhile, IBM began to worry that it was losing control of the industry it had created. In 1987, IBM released the PS/2