Widely used text-based operating system?
Well, almost any Unix or Unix-like can be used in this way. X11 GUIs are an entirely optional application. Many Linux users only use the command line.
MS-DOS was the first widely used operating system
windows
DOS meaning Disc Operating System
MS-DOS
It depends what you mean by widely used and PC. The widely used Apple II computer used Apple DOS while another operating system which was widely adopted (including versions for the Apple II) was called CP/M which was created by Digital Research. They went on to create DR-DOS which was one of the versions of DOS used on the early IBM personal computers. Microsoft had purchased an operating system called QDOS which was adapted by IBM into PC-DOS for their own computers and by Microsoft as MS-DOS for use on computers not made by IBM but following their design (known as IBM clones). These became increasingly popular and so MS-DOS became widely adopted and PC-DOS faded away. Apple went on to develop the Macintosh with its graphical user interface which Microsoft copied to create their Windows operating system.
MS-DOS was the first widely used operating system
Windows is the most widely-used desktop operating system made by Microsoft.
disk operating system
One of the most popular and widely used operating system is Microsoft Windows. It is compatible with most devices and has proved to be user-friendly.
windows
DOS meaning Disc Operating System
Windows XP and Windows 7
Android
MS-DOS
There are several possibilities, but Windows CE is fairly widely used.
There are no widely used versions of DOS. It hasn't been used as an operating system since Windows 95 came out. If I recall correctly, the last version of DOS was 7.5 back in the early 1990s.
It depends what you mean by widely used and PC. The widely used Apple II computer used Apple DOS while another operating system which was widely adopted (including versions for the Apple II) was called CP/M which was created by Digital Research. They went on to create DR-DOS which was one of the versions of DOS used on the early IBM personal computers. Microsoft had purchased an operating system called QDOS which was adapted by IBM into PC-DOS for their own computers and by Microsoft as MS-DOS for use on computers not made by IBM but following their design (known as IBM clones). These became increasingly popular and so MS-DOS became widely adopted and PC-DOS faded away. Apple went on to develop the Macintosh with its graphical user interface which Microsoft copied to create their Windows operating system.