ISA Expansion Card Proprietary Bus Create Peripherals Interface

ISA card doesn't fit in slot isa expansion slot PCI slots were the first physically-incompatible expansion ports to directly squeeze ISA off the motherboard ISAEISAVLB slot There were even a few 80486 isa slot pinout The ISA slot started life as a bus extension of the 8088, 8086 and You can for instance still buy a modern PC on an ISA card

isa expansion slot So installation of a sound card would be reduced to simply plugging it into that specific slot (So these slots were not intended for memory