What is the name of the command processor that usually operates in a text window?

The command processor that operates in a text window is specifically known as the shell. The shell serves as an interface between the user and the operating system, allowing users to execute commands, run programs, and perform tasks through a command-line interface. Commonly used in various operating systems, the shell interprets user input and communicates it to the operating system for processing.

While "Bash" is indeed a type of shell (specifically, a widely used Unix shell known as the "Bourne Again SHell"), it is not the general term for the command processor that operates in a text window. "Terminal" usually refers to the interface or emulator that provides the text window to access the shell, and "Kernel" is the core of the operating system that manages system resources. Thus, the most accurate and inclusive term for the command processor in a text window is "Shell."