a board that plugs into an open expansion slot inside your computer
a built-in modem located inside the computer while an external modem is a box-typed hardware connected to the computer through a cable
a card (circuit board) which is inserted into a slot inside a computer (the internal expansion bus)
a card which sits in an ISA or PCI slot on the motherboard inside the computer
an expansion card, which can be connected to a free slot in your computer
a special card installed inside the computer
An internal modem is a modem that is built in to your computer. Many new computers come with internal modems. Source: TechSoup.org
A modem installed in a computer. See modem.
