background
Processes usually running at a lower priority and with their input disconnected from the interactive session. Any input and output are usually directed to a file or other process.

background process
An autonomous process that runs under UNIX without requiring user interaction.

bash
Stands for GNU Bourne Again shell and is based on the Bourne shell, sh, the original command interpreter.

block special file
Provides a mechanism for communicating with device drivers via the file system. These files are called block devices because they transfer large blocks of data at a time. This type of file typically represents hard drives and removable media.

body
The set of commands executed by a loop is called the body of the loop.

Bourne shell
The original standard user interface to UNIX that supported limited programming capability.

BSD
Berkeley Software Distribution.