Tech History

December 25, 1987

Virus @ Christmas


The Christmas virus begins to effect IBM mainframe computers around the world. Technically defined as a worm, the Christmas virus drew a Christmas tree text graphic on the victim’s monitor and searched out other network users. Named CHRISTMA EXEC because IBM systems only supported eight-character filenames, it was the world’s first widely disruptive computer worm.

Tech History

December 22, 1882

First Electric Christmas Tree Lights


Edward Johnson, an associate of Thomas Edison, has walnut-sized bulbs made specifically for him to wire his Christmas Tree with electric light. The 80 red, white, and blue bulbs formed the first set of electric Christmas Tree lights in history. Prior to this, people would traditionally decorate their trees with wax candles.