Q What's the difference between an internal and external modem, and which should I choose? I just want to connect to the Internet.

A An internal modem is an external modem without its shell. They're basically the same thing, but they connect differently and they get their power differently. You'll need three cables for an external modem ù power (usually from a plug-pack), phone and a serial cable (a cable going to a serial port on the back of the PC).

An internal modem gets its power from, and transfers its data directly with, the PC via the PC's internal bus (which is just a fancy way of saying the automatic connections that are made when you plug in a PC card like a modem).

While they can be a touch more fussy to install (you have to open the PC!) internal modems are neater and less likely to give trouble. There are advantages to an external modem, such as being able to see the pretty flashing lights, or being able to unplug it and lend it to Ralph who lives next door. If you already have one or the other, don't lose any sleep over it.