"Theodor Holm Nelson (born June 17, 1937) is an American pioneer of information technology, philosopher, and sociologist. He coined the terms hypertext and hypermedia in 1963 and published them in 1965. Nelson coined the terms transclusion, virtuality, and intertwingularity (in Literary Machines). According to a 1997 Forbes profile, Nelson "sees himself as a literary romantic, like a Cyrano de Bergerac, or 'the Orson Welles of software'."

Nelson earned a B.A. in philosophy from Swarthmore College in 1959. While there, he made an experimental humorous student film, The Epiphany of Slocum Furlow, in which the titular hero discovers the meaning of life. His contemporary at the college, musician and composer Peter Schickele, scored the film. Following a year of graduate study in sociology at the University of Chicago, Nelson began graduate work in "Social Relations", then a department at Harvard University specializing in sociology. in 1960, ultimately earning an A.M. in sociology from the Department of Social Relations in 1962. After Harvard, Nelson was a photographer and filmmaker for a year at John C. Lilly's Communication Research Institute in Miami, Florida, where he briefly shared an office with Gregory Bateson. From 1964 to 1966, he was an instructor in sociology at Vassar College.

During college and graduate school, he began to envision a computer-based writing system that would provide a lasting repository for the world's knowledge, and also permit greater flexibility of drawing connections between ideas. This came to be known as Project Xanadu.

Nelson founded Project Xanadu in 1960, with the goal of creating a computer network with a simple user interface. The effort is documented in the books Computer Lib / Dream Machines (1974), The Home Computer Revolution (1977) and Literary Machines (1981). Much of his adult life has been devoted to working on Xanadu and advocating for it.

In 1965, he presented the paper "Complex Information Processing: A File Structure for the Complex, the Changing, and the Indeterminate" at the ACM National Conference, in which he coined the term "hypertext".

In 1976, Nelson co-founded and briefly served as the advertising director of the "itty bitty machine company", or "ibm", a small computer retail store that operated from 1977 to 1980 in Evanston, Illinois. The itty bitty machine company was one of the few retail stores to sell the Apple I computer. In 1978, he had a significant impact upon IBM's thinking when he outlined his vision of the potential of personal computing to the team that three years later launched the IBM PC."

           (from Wikipedia)

Three pages from Nelson's Literary Machines