(en) Digital Equipment Corporation, FOCAL Programming Manual for PDP-8, PDP-8/S, PDP-8/I, LAB-8, LINC-8, (lire en ligne)
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(en) Edgar H. Schein, Paul J. Kampas, Peter S. DeLisi et Michael M. Sonduck, DEC Is Dead, Long Live DEC: The Lasting Legacy of Digital Equipment Corporation, Berrett-Koehler Publishers, (ISBN978-1-60509-302-4, lire en ligne)
(en) Glenn Rifkin et George Harrar, The Ultimate Entrepreneur: The Story of Ken Olsen and Digital Equipment Corporation, Contemporary Books, (ISBN978-0-8092-4559-8, lire en ligne)
(en) Ziff Davis Inc, PC Mag, Ziff Davis, Inc., (lire en ligne)