The content of this entry comes courtesy of Popular Science, February 2009 Edition.
Question: Does the space shuttle's computer really run on just one megabyte of RAM?
The brain of NASA's primary vehicle, known as the General Purpose Computer (GPC), has the computational power of an IBM 5150, that '80s icon. Such an antiquated computer works just fine for NASA. The GPC has just 0.005 percent of the power of an Xbox 360.
The shuttle does not need to support powerful graphics and such, only to support core functions like controlling the thrusters. No Windows, No Powerpoints, no games! The GPC has flown so many missions that there is no reason to replace it.
Interesting to know that the computers we are using to make Blogger entries, and to read said entries, have tremendously more computational power than the computers used to control the Space Shuttle. That is amazing.