DOS or more specifically MS-DOS was the platform on which the TUI, terminal user interface, applications ran. Because MS-DOS lacked universal drivers for printe

DOS or more specifically MS-DOS was the platform on which the TUI, terminal user interface, applications ran. Because MS-DOS lacked universal drivers for printers and networking as well as being single tasking, it was up to vendors to provide the printer drivers, network stack as well as TSR, Terminate-and-stay-resident, programs to allow switching between applications. For most people a computer was just a function of their job and not a career, so using a single tasking program to edit a spreadsheet and sending it to someone on portable storage like a 3.5" floppy drive seemed normal. Most meetings were in person and rarely did meetings happen over group calls. MS-DOS represents that world for the majority of people working with computers in the 80's. Also, there was smoking indoors.