I just want to do word processing and Internet.

The connection to the Internet is the biggest factor in determining what computer is required. There are three basic ways to connect to the internet; 1) dial-up, 2) high-speed (cable or DSL), or 3) high-speed with a wireless local loop. If dial-up, then the phone line becomes the limiting factor not the speed of the computer. In this case, a Pentium II processor (266MHZ to 400MHZ) is all that is necessary. Conversely, if you will be using a high-speed connection, the processor speed comes into play so higher speed Pentium II or low end Pentium III (650MHz) would be sufficient. The word processing application and other basic Office functions will run fine on any of these computers.