DOS Shell - Shortcomings

Shortcomings

DOS Shell was incapable of full multitasking. It supported rudimentary task switching; it could switch between programs running in memory, at the cost of performance hit. However, all the running programs had to fit into conventional memory area, as there was no support for paging to disk. (Programs with DOS extenders such as DOS/4GW were immune to this issue as DOS/4GW spared conventional memory from overflow.)

In time, Windows 3.1x, with its own graphical user interface, became much more popular among computer users. Windows was capable of multitasking. System performance was much higher, with complete access to the system's memory.

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