Mark G. Sobell, A Practical Guide to the UNIX SYSTEM, Benjamin-Cummings, 1995. SuperCard Manual Set, Allegiant Software, 1994.
The World Wide Web itself
Department of Electrical Engineering and Computer Science University of Illinois at Chicago
Mark G. Sobell, A Practical Guide
to the UNIX SYSTEM, Benjamin-Cummings, 1995. 
SuperCard Manual Set, Allegiant
Software, 1994. 