Software

You can start looking in two locations in the registry:
HKCU\Software
and
HKLM\Software

That will show you everything Windows knows about. After that, you'll have to physically search all the drives for executables.

Ralph

Use a system inventory utility such as Belarc Adviser www.belarc.com

The free tool is ONLY for personal use.

Chas

Win98 has it build in Accessories, System Tools, Sytem Information.
Zdnet and a search for Freeware can bring up numerous free programs that can help.
Kim

Another easy way:

Navigate to:
Start -> Settings -> Control Panel

Open the "Add/Remove Programs" icon.

In the "Install/Uninstall" section you will find a list of all the installed softwares