Pascal
Pascal Language and sample programs
Welcome to Pascal for programming illiterates
Pascal Programming: Brian Brown/Peter Henry/CIT
Taoyue.com/Learn Pascal tutorial; TaoYue.com

C programming: University of Strathclyde Computer Centre
Free Programming and Computer Science Books.
Howstuffworks:" How C programming works".
Informit Safari Tech Books Online
Java For students ; Ben Golding
Java Tutorial; Sun Microsystems, Inc
Visual Basic examples; Saul Greenberg
Visual Basic Tutorials; matthew J.west
Microsoft Corporation. （2006）. Learn Visual Basic