Logitech has manufactured its one billionth computer mouse as the technology moves to its 40th birthday.
Logitech's one billionth mouse has been produced at its main China factory.
The mouse now faces serious competition from touch and sensor technolgies, with many laptop users relying on the touchpad built into their machines. Touch screens are also expected to make a dent in the mouse market.
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The sale of desktop PCs has also declined, and these are usually operated with a mouse.
The mouse has moved with the times down the years though. Although the device's wire "tail" was the reason for its moniker, many users have sliced that off with the use of infra-red, laser and wireless devices.
Logitech's one billionth mouse came off the production line last month and Logitech is now running a $1,000 reward competition to find it.
The computer mouse turns 40 on 9 December - the 1968 date when the mouse was first put through its paces by US researchers at Stanford University.