BASIC was created, of course, to be simple to learn and use by non-programmers. Relive just how simple and stripped down the language was by reviewing Dartmouth’s original BASIC instruction manual from 1964. It contains descriptions of the handful of operations (like PRINT, FOR, GOTO and READ) and mathematical functions (e.g., SIN, COS, ABS, RND) it supported. It also describes the revolutionary new computer time-sharing system they created (DTSS), which could support up to 20 users at a time. Finally, the manual has instructions on how to use the teletype input, which was like a typewriter, but with some special keys (e.g., RETURN) and only typed in all-caps. It’s a true gem of programming history.