Bob Wallace was an American software developer, programmer and the ninth Microsoft employee. He was the first popular user of the term shareware, creator of the word processing program PC-Write, founder of the software company Quicksoft and an "online drug guru" who devoted much time and money into the research of psychedelic drugs.

The File Retrieval and Editing SyStem, or FRESS, was a hypertext system developed at Brown University starting in 1968 by Andries van Dam and his students, including Bob Wallace. It was the first hypertext system to run on readily available commercial hardware and OS. It is also possibly the first computer-based system to have had an "undo" feature for quickly correcting small editing or navigational mistakes.