Microsoft officially started 41 years ago today. On April 4, 1975, co-founders Paul Allen and Bill Gates launched their business to sell the Altair BASIC interpreter that was used on the MITS Altair 8800 personal computer. The company started in Albuquerque, New Mexico but moved to its present worldwide office in Redmond, Washington in 1979.


Today, you can go to the original Microsoft company location at 115 California St. NE, in Albuquerque, New Mexico and check out a plaque that's been placed on a rock to mark the milestone. The plaque itself has been stolen a number of times over the years but, as of this writing, it should be in place. It's a little hard to believe that this spot was the place that one of the biggest companies of all time got its start.