Help - Glossary - P - Programming Environment
A running program in which one can write programs. One of the special things about Squeak is that the programs one writes in the Squeak Programming Environment also run inside it, and can be altered - rewritten, tweaked - on the fly, while they are running. Some other special thing about the Squeak Environment is that it is written in the Squeak Language; that all of Squeak is open source, i.e. you get ALL the source code; and that everything about it can be altered by you, according to your tastes and abilities.
Also note that a Programming Environment is a tool to make tools, and that the Squeak Environment includes it and is (almost wholly) written in it. See also Total Computing.
Glossary - P