What capability did Disk Operating Systems provide to operators?

Disk Operating Systems (DOS) provided operators with the capability to choose which program to run. This functionality is fundamental to the way systems operated under DOS, as it served as the interface between the user and the hardware of the computer. The user could input commands to execute various programs stored on the disk, making it easy to manage tasks by selecting the appropriate software for different activities.

The ability to run specific programs allows users to perform a wide range of functions, from simple text editing to complex data processing, depending on the applications available on the system. This level of control was crucial in allowing users to engage with the system effectively and leverage its capabilities for various tasks.

While selecting hardware, optimizing storage, or automatic updates are important in a broader context, they were not primary functionalities delivered directly by Disk Operating Systems. Hardware selection typically took place during the system's setup or configuration, while disk optimization and program updates often required separate tools or processes outside the scope of basic DOS operations.