Question

Which programs allow multiple users to type to each other in real time

Answer 1

MP/M, Concurrent DOS, Multiuser DOSand FlexOS.

Answer 2

The Multiuser operating system allows multiple users to use the same data from different computers.  

Multiuser are used in different offices and networking areas where many people will access the same data in the same period of time.

Many of our systems support multiuser which include window, Linux, Solaris, ONX, Plan 9 etc.

The resources cannot be installed on every system.

The Non- wireless system is more common of these multi-user systems.