Also although there a lot of RAM, and DOS didn't provide any real "multitasking" you got a fair simulation of such things via a variety of TSR programs: https

Also although there a lot of RAM, and DOS didn't provide any real "multitasking" you got a fair simulation of such things via a variety of TSR programs: https://en.wikipedia.org/wiki/Terminate_and_stay_resident_program https://en.wikipedia.org/wiki/Terminate_and_stay_resident_pr...