Table of Personal Computer Buses

PC Interfaces Comparison

IBM compatible computer buses, Macintosh computer buses, and SGI bus interfaces are listed below.
In most cases the backplane or mother-board will provide slots to add additional cards to the system. The additional slots are called expansion slots.
The actual number and type of expansion slots will vary with different mother boards. How ever some reduced cost systems shipped with no expansion slots at all.
But the real number of maximum expansion slots will depend on the interface bus used. For example the ISA bus; PC-XT and PC-AT buses could have a maximum number of 8 expansion slots.
Once a particular bus begins to become obsolete, it's very common for the mother board to provide two or more different slots.
For example as the ISA slot was becoming obsolete, a mother board might ship with a number of PC-AT slots, a few PCI slots, and an AGP slot.

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