nk497 writes: "It's been 30 years since the spreadsheet was first developed, in the form of VisiCalc. It was first announced in an ad in Byte Magazine with the tag line: "How did you ever do without it?" In June 1979, it was shown off at a trade show to an audience of two. VisiCalc became popular because it was a business-friendly program that didn't require programming skills. Despite VisiCalc selling hundreds of thousands of copies, and the idea eventually spawning the Excel we all know and love to hate, the developers didn't make a fortune off their idea, as they never did patent it."