If you have a busy life, odds are that you own a filofax or keep track of appointments on scraps of paper on your desk or even in your pocket. The Handheld PC – more commonly known as the PDA (Personal Digital Assistant) – has been proven to get your life in order and on track. Think of it more as an electronic brain, one that helps you to keep track of your professional and personal life. As the name implies, it’s a personal assistant that can remind you of that important meeting or occasion. It can help you keep track of your finances or simply be used as an address book. The flexibility of the latest devices means that you can use it any way you see fit – use it as an MP3 player, watch movies on the move and even take pictures. What’s more, with prices falling, PDAs are more affordable than ever. In this group review, we're pitching eight of the latest versatile handhelds together to find the most flexible friend around.