GW-Basic was my first programming language. And i never found out what the 'GW' stands for.
From the Wikipedia article:
There are several theories on what the initials "GW" stand for. Greg Whitten, an early Microsoft employee who developed the standards in the company's BASIC compiler line, says Bill Gates picked the name GW-BASIC. Whitten refers to it as Gee-Whiz BASIC and is unsure if Gates named the program after him. The Microsoft User Manual from Microsoft Press also refers to it by this name. It may have also been nicknamed Gee-Whiz because it had a large number of graphics commands. Other common theories as to the initials' origins include "Graphics and Windows", "Gates, William" (Microsoft's president at the time), or "Gates-Whitten" (the two main designers of the program).