Ted Nelson was a pioneer in computer science who coined the terms "hypertext" and "hypermedia." He advocated for making computers accessible to ordinary people and envisioned them being used across all media. His 1974 book "Computer Lib" dreamed of a world where computers were integrated into everyday life like food and books, challenging the control that "computer experts" held over technology. The book helped popularize his vision of "Dream Machines" and influenced many others with its radical ideas about the future of computers and media.