en one piece of data was changed, someone had to go back and recalculate the whole chart. Dan Bricklin had a vision of an application that would take huge tables of numbers have the computer handle all the computation process. What was created was the first spreadsheet program, although that term was not present then. VisiCalc allowed people to take large financial tables, where all the data values depended on all the other data values, and process them automatically. If you found out that you needed to change a number at the beginning of the table, VisiCalc would update all the other numbers for you (Campbell-Kelley and Aspray 250-251; Triumph; Shurkin 311).VisiCalc was an immediate success. Sales of the Apple II soared. By 1980 Apple estimated that over 1/5 of its sales were driven by VisiCalc (Campbell-Kelley and Aspray 250-251). As sales of Apple IIs rose, so did the sales of enhancements for the Apple II. Wozniak tried to build accessories that would make the Apple II attractive to people outside the business world. He developed many connectors for various printers and modems. He also made a serial card and a ROM (Read-Only Memory) card. Soon more and more manufacturers signed on to make Apple IIs and production began to soar (Freiberger and Swaine 216-217). The Apple II became the first personal computer that was meant for anyone, and it revolutionized the personal computing industry.There were also many other computers that came out during the 1970s, but none of them were as revolutionary as the Altair 8800 or the Apple II. Most of them were either clones of the Altair or pathetic attempts at an Apple II. None of them shaped the industry in the way that the Altair and the Apple II did. The Altair was the first PC, it provided a new dimension to computing and a basis for everything to follow. The Apple II was the first step, and in fact it was a huge leap, toward a modern personal computer. Both of these products provided a launch...
