Three finger salute
Three
finger salute is slang used to describe the IBM PC compatible three key sequence
Ctrl + Alt + Del
that was developed by David Bradley. This term became popular after IBM PC compatible users continually had to press these keys each time their computers froze or had other issues.
Today, when pressing Ctrl-Alt-Delete a NMI is set to the CPU and Microsoft Windows opens the Task Manager, which allows them to see what's running on the computer and have access to End Task open programs.
Also see: Operating System definitions, Warm boot