| List I (Generations of Operating Systems) | List II ( Features) | ||
| A | Zeroth Generation | 1 | These operating systems were characterized by machine and assembly language and stored program concepts. |
| B | First Generation | 2 | FMS (Fortran Monitoring System) and IBSYS (IBM’s tape-based operating system for 7090 / 7094 computers.) are examples of typical operating systems. |
| C | Second Generation | 3 | The programmer/operator hand-coded the bare machine. |
| D | Third Generation | 4 | Multiprogramming time-sharing and real-time processing were introduced |
1
A-4, B-1, C-2, D-3
2
A-3, B-2, C-1, D-4
3
A-1, B-3, C-4, D-2
4
A-3, B-1, C-2, D-4