Apple Macintosh

106327241172297741_xLZY07dd_cIn 1977, 26-year-old Steve Wozniak and 29-year-old Steve Jobs marketed their new invention, the Apple II personal computer.

In 1984, the revolutionary Apple Macintosh was released, and launched in the most expensive television commercial ever made - The ad was based on George Orwell's novel 1984 and cost $600,000 (£360,000) to make, and a further $1,000,000 (£600,000) to show during the NFL Super Bowl in January 1984.

The impact of the ad was so great, and the recall so high, that it is considered to be one of the most cost-effective commercials ever made. It was shown only twice - the other occasion was on a small station in the US in December 1983.

It depicted an IBM world being overrun by a new machine - the Mac.