http://www.retrothing.com/2007/05/apple_ii_turns_.html
"June 5th will mark the 30th birthday of the Apple II computer. There were other affordable hobbyist computer kits available before, but the Apple II was the first computer that was ready to run out of the box. It's not surprising that an Apple II was the first computer that I used in elementary school since Apple made inroads with the U.S. educational system from their earliest offerings. What may be a surprise is that the Apple II was manufactured up until 1993 (with some redesigns and cost-reduced versions), with many still in operation today. Between five and six million of the putty colored machines were sold"