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It is conventional for environment-variable names to be chosen to be in all upper cases. In programming code generally, this helps to distinguish environment variables from other kinds of names in the code. Environment-variable names are case sensitive on Unix-like operating systems but not on DOS, OS/2, and Windows.
Development originally took place on a self-hosted source-code repository running Mercurial, until Python moved to GitHub in January 2017. [179] CPython's public releases come in three types, distinguished by which part of the version number is incremented: Backward-incompatible versions, where code is expected to break and needs to be manually ...
The Xterm terminal emulator. In the early 1980s, large amounts of software directly used these sequences to update screen displays. This included everything on VMS (which assumed DEC terminals), most software designed to be portable on CP/M home computers, and even lots of Unix software as it was easier to use than the termcap libraries, such as the shell script examples below in this article.