Bash
Bash, short for Bourne Again SHell, is a Unix shell and command language created by Brian Fox for the GNU Project in 1989. Bash is widely used for scripting, automation, and system administration across Linux, macOS, and other Unix-like operating systems. It can be installed through system package managers (e.g., apt install bash on Debian/Ubuntu, brew install bash on macOS) or accessed via official documentation at the GNU Bash Official Page.
Batch
Batch, short for Batch Scripting Language, is a command-line scripting language for Windows created by Microsoft in the early 1980s. Batch is used to automate repetitive tasks, manage files, configure system settings, and run sequences of commands in the Windows Command Prompt (CMD). Scripts are typically saved with the .bat or .cmd extension and executed directly by the command interpreter.
DCL
DCL, short for Digital Command Language, was created by Digital Equipment Corporation (DEC) in 1978 as the primary command language for its VMS operating system. DCL is a scripting and command language used to automate system tasks, manage files, and control processes on VMS and OpenVMS systems.