Complex sentence: The Extended Industry Standard Architecture (in practice almost always shortened to EISA) is a bus standard for IBM compatibles that extends the ISA bus architecture to 32 bits and allows more than one CPU to share the bus.
Split into simpler sentences: The Extended Industry Standard Architecture (in practice almost always shortened to EISA) is a bus standard for IBM compatible computers. EISA extends the ISA bus architecture to 32 bits and allows more than one CPU to share the bus.