Spider Solitaire in Windows 7
Developer(s)
Microsoft
Initial release
June 25, 1998
Operating system
Microsoft Windows
Successor
Microsoft Solitaire Collection
The game is called spider  solitaire due to the relationship between spiders having eights legs, and the eight foundation piles that need to be completed in order to win the game. While the current version originates from 1949, the first mention of Spider comes Games Digest published in 1937.