⟩ What is ISA(eye-suh) Slot?
Pronounced "eye-suh," ISA accepted plug-in cards for sound, display, hard drives and other connectivity. Originally called the "AT bus" and introduced with the IBM PC AT in 1984, the AT/ISA bus extended the PC bus from 8 to 16 bits. For several years, motherboards provided a mix of both 8-bit and 16-bit ISA slots.