Expansion slots are compartments into which expansion cards can be inserted. These are cards which give the computer new features or increased performance. There are several types of slots:
- ISA slots (Industry Standard Architecture): For inserting ISA slots. The slowest ones are 16-bit.
- VLB slots (Vesa Local Bus): Bus formerly used for installing graphics cards.
- PCI slot (Peripheral Component InterConnect): used for connecting PCI cards, which are much faster than ISA cards and run on 32 bits
- AGP slot (Accelerated Graphic Port): A fast port for a graphics card.
- PCI Express slot (Peripheral Component InterConnect Express): Faster bus architecture than AGP and PCI buses.
- AMR slot (Audio Modem Riser): This type of slot is used for connecting mini-cards to PCs which are built for it.
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