It used to be just a Personal Information Manager, but with the newer models having faster processors, more memory, and better screen resolutions, you can actually do a whole lot more than just manage your contacts and calendar. I have setup many users with their Palm Pilots with the following capabilities:
- Web browsing
- Email
- Office document editing
- Instant Messenging
- Offline Maps and Driving Directions
- Play video and audio files
- Foreign Language dictionaries
- Remote Control for TVs and other devices
- Remote access and control to computers
- FTP capabilities
- Web feed reading
- Ebook reading
- Blogging capabilites
- Minor Photo editing
That's just to name a few...If you search the web enough, you can find software (Some free some commercial) that can do these things. I don't take my laptop with me when I go on trips, I just bring my Palm! Good Luck!