Bash

Bash, a contraction of Bourne Again SHell, is GNU's command-line interpreter for Unix, included by default with Mac OS X through macOS Mojave (10.14).
==Description==
Bash is a POSIX-compliant shell with full Bourne shell syntax, and some commands built in. The Bourne Again Shell supports -style command-line editing, job control, functions, and on-line help. Written by at the , version 1.14.1 includes a yacc parser, the interpreter, and documentation.. 1994-07-15.
===Bash on Mac OS X===
Bash has been the default command-line shell for Mac OS X since its NeXTSTEP origins. In 2019, Apple replaced bash with zsh in new installations of macOS Catalina (10.15). Upgrades to Catalina will retain the user's existing installation of bash with a notification in case the user would like to switch to zsh.Resources for Adapting to zsh in Catalina by Josh Centers, TidBITS. 2019-12-08.
==References==
==External links==
*GNU Bash at GNU Operating System
* at Wikipedia
Category:Acronyms
Category:Unix software
Category:1989 introductions