What is the old method of controlling a computer by typing commands in response to prompts called?

The old method of controlling a computer by typing commands in response to prompts is known as the Command Line Interface (CLI). This interface allows users to communicate directly with the operating system through text-based commands, making it a powerful tool for performing various functions, such as file management and executing programs. Users type specific commands into a terminal or command prompt, and the system processes these commands, providing output or executing tasks accordingly.

The CLI is characterized by its efficiency and flexibility, particularly for users who are skilled in command syntax. This method of interaction contrasts with graphical user interfaces (GUI), which provide visual elements like windows, icons, and menus to facilitate interactions, but may not offer the same level of control and speed as a CLI. While more modern systems often favor GUIs for their user-friendliness, the CLI remains an essential tool, especially for advanced users or in scripting and automation scenarios.

The other terms, like API (Application Programming Interface) and OS (Operating System), refer to different aspects of computing that do not specifically pertain to user command input methods. API refers to protocols and tools that allow different software applications to communicate, while OS pertains to the software that manages hardware and software resources on a computer.