A PC card slot is an expansion slot often found in notebook computers that allows for the easy and quick addition of a host of different devices. Originally designed for adding memory to portable computer systems, the PC card standard has been updated several times since its original creation. Definition of expansion slot in the Definitions.net dictionary. Meaning of expansion slot. What does expansion slot mean? Information and translations of expansion slot in the most comprehensive dictionary definitions resource on the web.

An expansion card is a printed circuit board that can be installed in a computer to add functionality to it. For example, a user may add a new graphics card to his computer to give it more 3D graphics processing power. An audio engineer may add a professional sound card to his machine to increase the computer's audio input and output connections. Users that need more Firewire or USB ports can add Firewire or USB expansion cards, which provide additional connections.

Most expansion cards are installed in PCI slots. This includes variations of PCI, such as PCI-X and PCI Express. Graphics cards may also be installed in an AGP slot, which is designed specifically for video cards. Since expansion cards require open slots, they can only be installed in computers that have available expansion slots. Therefore, computers like the Apple iMac and other all-in-one machines cannot accept expansion cards. Computer towers, however, often have two or three open expansion slots, and can accept multiple cards.

Laptops don't use traditional expansion cards because of their small form factor. However, some models can accept removable PCMCIA cards that add extra ports or other functionality to the computer.

Expansion Slots Definition

Expansion Slots Define

Updated: October 4, 2008