The rapid progress in computer technology over the past decade has enabled designers to create a huge range of portal computing devices from PDAs - which organise our schedules and allows us to read the news on the move - to handheld media players - that let us watch films wherever we like. Computer scientists are now designing prototypes of the next generation of portable computers, so small we'll be able to wear them.
The Esleeve is based around a wristwatch computer with a database of local facilities that can be activated using speech commands. You could ask it to find the nearest library - you'd say 'find library' and the speech recognition circuit will work out what you've said and feed it through to the wrist watch computer .
The Esleeve is linked to the global positioning system (GPS) - a network of 24 satellites circling the Earth. By measuring the time it takes to send a signal to and from the satellite the E-sleeve can work out a position to within a few metres anywhere on the planet.
The wrist watch computer also has a wire frame model of the centre of Bristol so it's able to display your local surroundings making it very easy to recognise buildings.
In what other ways could you use GPS technology?