• Datebook--This is most important part of the organizer. You can input meetings, appointments, etc., all in basically the same format as a large, bulky Day Planner.
• Memo Pad--A place to jot notes, write a book, whatever.
• Calculator--Math.
• To-Do List--Helps you accomplish those nagging tasks.
• Address Book--Keeps track of all your important contacts.
• OnScreen Keyboard--Lets you type with the touch screen and your stylus.
• Grafitti(Palm)/Character Recognizer(Pocket PC)--Lets you handwrite instead of type.
• Email--Lets you compose email and send on HotSync or wireless.
• Backlight (most PDAs)--Priceless in dim lighting.

If you've ever looked at a calendar, jotted a note on a napkin, carried a planner , then a PDA is for you. There is also a lot of entertainment value in the PDA. You can find thousands of games to please any taste. There's software to carry your pictures, listen to music, watch a movie, you name it!