any 5 operating system of computer from generation 1 to 4
Answers
1st Generation: Operating systems were unheard of. The usual mode of operation was for the programmer to sign up for a block of time on the signup sheet on the wall, then come down to the machine room, insert his or her plugboard into the computer, and spend the next few hours hoping that none of the 20,000 or so vacuum tubes would burn out during the run.
2nd Generation: FMS (the Fortran Monitor System) and IBSYS, IBM's operating system for the 7094.
3rd Generation: This system was developed on MINIX and originally supported various MINIX features (e.g., the MINIX file system). It has since been extended in many ways but still retains a large amount of underlying structure common to MINIX, and to UNIX (upon which the former was based). Most of what will be said about UNIX in this book thus applies to System V, BSD, MINIX, Linux, and other versions and clones of UNIX as well.
4th Generation: MS-DOS, Windows, Linux, Mac-OS, e.t.c.