At this stage you can get modules for games, memory expansion and backup, a digital camera, an MP3 player, a GPS and a mobile phone module

The past two years have been littered with attempts at combining a phone with a PDA. The first was O2 with its XDA (January 2003, page 41) - an excellent first try, and one that will be revised this month.

The 650 really picks up where the 600 left off, and while it doesn't look too different to the eye, many of the changes are under the hood or subtle manipulations of the 600's design. It runs the new Palm OS 5.4 and has a much faster 312MHz Intel PXA270 processor, but the most immediate difference is the screen: it's now double the resolution at 320 x 320.

Sony, HP and Handspring had better take note – Palm has just rewritten the PDA rules. Just in time for Christmas, Palm has unleashed a stylish, lightweight and fully featured PDA that blasts the sub-$700 opposition away – by hundreds of dollars.

Purely because of its size, even the smallest PDA isn’t something you’re likely to feel comfortable holding to your ear as a phone for long periods of time. And, despite its slim curves and great physique, the Xda II is no exception.

Data input is one of the biggest issues many people have with PDAs, and while stylus handwriting recognition and Graffiti dont take long to learn, they can be difficult to master, and cant compare to typing on a keyboard.

A seemingly new entrant to the PDA market, the Siemens SX45 is a Pocket PC PDA that may appear familiar to users or owners of the Cassiopeia range. That's because the SX45 is based on the Cassiopeia e-125 PDA.

Impressive and free antivirus and antispyware package

Sony has finally launched the Clie PDA in Australia.

The m505 is also the only device in the Labs to feature vibrating alarm alerts.

As the title suggests, this book provides a dated but comprehensive insight into Palm handheld technology.

Plenty of modern phones support email, of course, but what always made BlackBerry special was its push technology. With this, you don't need to dial up to collect your email: just sit back and wait for the messages to come to you. Wherever you are, if an urgent email comes through to any of your email addresses -- and the 7100v supports up to 10 -- you can act on it instantly.

It is perhaps understandable that mobile phones should be the real leaders in the techno fashion stakes; after all there are close to one billion of them in circulation and the number is growing daily

Just a few years ago, a PC equipped with a 200MHz processor and 64MB of memory would have been considered high end. Even today, it will happily run most apps you care to throw at it. So, when you cons