point of presence
     
        (PoP) A site where there exists a collection of
        telecommunications equipment, usually modems, digital leased
        lines and multi-protocol routers.  An Internet access
        provider may operate several PoPs distributed throughout
        their area of operation to increase the chance that their
        subscribers will be able to reach one with a local telephone
        call.  The alternative is for them to use virtual PoPs
        (virtual points of presence) via some third party.
     
        (1994-12-13)