Today the humble computer mouse celebrates its 40th birthday. The first mouse was launched back in 1968, with Dr Engelbart's wooden block with wheels and a chord. The working term "mouse" was never bettered, and now 40 years on these 'mice' have swamped the planet - with Logitech recently announcing the production of their one billionth mouse.

Although no one is arguing that the mouse has been used with great effect, it could be questioned whether it will be around for the next 40 years.

Computer operating systems are strongly oriented to mouse interaction. However, using a mouse places a lot of strain on your hand and arm and increases the risk of RSI.

An ordinary mouse forces your arm to twist, moving it from its natural position. The Evoluent mouse is ergonomically designed to keep your hand in a comfortable and healthy position - just like a handshake!

And with forecasts of the next generation of computers being controlled by touch screens (like the iPod) and gesture control (such as Wii), the mouse might just take an early retirement.

But until then, Happy Birthday mouse!