WEB is a computer programming system created by Donald Knuth as the first implementation of what he called "literate programming": the idea that one could create software as works of literature, by embedding bits of code inside descriptive text, rather than the reverse as is common practice in most programming languages.
The WEB system consisted of two primary programs: tangle, which produced compilable Pascal code from the source texts, and weave, which produced nicely-formatted printable documentation using TeX.
A newer version of WEB is CWEB.
WEB is also used to refer to the World English Bible.