This guide contains a serious factual error. He states that Apple was the first to produce a computer with a graphical interface. This is NOT TRUE. The first computer with a graphical interface, mouse was produced by Xerox Corp years before Apple did. I worked for Xerox in the 70's and worked as a tech on the Star system which had 19" square monichrome monitor. It  used a mouse and graphical icons on the screen. It was widely used by NASA and attorneys. NASA designed many of their rocket systems on this computer. It had a large case with a 40MB yes MB hard drive and an 8" floppy disk drive, used to load software. It was networked and used Ethernet protocols. It came with word processing, spreadsheet, database, a drawing program, and many other innovative features not seen for 6 or 7  years by Apple on it's Lisa. Which by the way was a rip-off of the Star when Jobs visited PARC, (Palo Alto Research Center) Xerox's development center and saw the Star in the mid 70's. I noticed most sites Googled for graphical interface also falsely credit Apple with this development. A couple correctly list PARC as the developer of the mouse, graphical interface and ethernet but very few.

Just wanted to set the record straight.