Question

These operating systems were referred to as command-based.

Answer 1

Windows. Commonly the application MS-DOS could handle the functionalities.

Overall, Windows is the answer

Answer 2

Answer:

MS-DOS and Unix.

Explanation:

In the oldest versions of Windows Operating System, MS-DOS was used; it was purely command-line based and it didn't have GUI )graphical user interface) and users had to learn command lines to open and manipulate files. It isn't used anymore. UNIX had similar characteristics when it was first built in the 1960s.