Something I never knew when I was younger.
The reason for the Turbo button in your old PC's.
In the early days of the PC, there was only IBM, and there were only a handful of different speeds a PC could run at. Early software was written by programmers who believed they were writing it to run on a machine of a specific speed. When newer, faster machines would come out, some of this software (especially games) would stop working properly because it would run too fast. Turning off the "turbo" function of the PC (which meant anything that made it run faster than an IBM of a particular era) would make the machine run slower so this software would work. In essence, it was a "compatibility mode" feature, to slow down the machine for older software.
http://www.codinghorror.com/blog/2008/12/pressing-the-software-turbo-button.html
You've just been hit by trivia knowledge.
