Differences between the buses.

Differences between the buses.

8-bit bus - The data is transmitted to the expansion slots and the other components of the bus only
8 by parallel lines of data.

Or ISA bus of 16 bits - The data are transmitted through 8 or 16 lines of data, depending on the type plate
used in the expansion slot.

MCA or EISA bus - The data is transmitted to the plates designed specifically to work with buses
Bit 32 through 32 data lines. MCA expansion slots do not accept cards of 8 or 16 bits.

Adaptability EISA - The design of the expansion slots EISA allows plates 8 or 16 bits are fit enough
to make contact with the line 16 connectors that manage the data based on the EISA bus. But the plates designed
specifically for the standard EISA can fit deeper and align its connectors to the 32 special fittings slot
that manage data based on standard EISA.

Source: Evolution of Computers