Expansion Slots

With technology changing so quickly, it's a wonder our computers don't become obsolete a month after we buy them. Without a way to expand a computer's capabilities, the world would quickly fill up with oversize paperweights and doorstops.
Thank heaven for the far-thinking propeller-heads who dreamed up internal expansion slots -- the ubiquitous feature on personal computers that helps keep the world safe from massive silicon junk piles.
Most desktop varieties of IBM-compatible and Macintosh computers have at least one expansion slot -- a thin strip that locks an expansion card in place on the motherboard inside your computer. These expansion cards add functions that you might not have been able to use before, including things like sound, a fax-modem, high-resolution graphics or connections to local area networks.