Since the 1960s, BASIC has introduced countless beginners to computer programming. Here's how the language got started, the paths it cleared for Windows and Apple, and where you can still find it ...

SEE: Windows 10: A cheat sheet (TechRepublic) However, that only shows one set of applications, and others might be using Basic Authentication to sign in across all the other Office 365 services.

Ahead of Microsoft's 50th anniversary this week, co-founder Bill Gates has released the company's original source code.