More than 120,000 people are expected at the UK's largest gadget show over the next five days.
With hundreds of stands and displays in Birmingham showing off the very latest technology people can get an idea of what the future may look like.
But alongside large international companies there are smaller ones too trying to make it big.
With everything from gaming to car and home entertainment to the latest tablets and smartphones, Newsbeat's Dan Whitworth has been to check it out.
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