| #10441 | NorthSim Publications | Z |
| #17575 | Northern Computers | H |
| #22652 | Northern Games | P |
| #10442 | Northern Technology Books | Z |
| #10443 | Northwest Synergistic Software Inc | Z |
| #17577 | Northwish | M |
| #10444 | Norton | ? |
| #10445 | Norvac Engineering | Z |
| #10446 | Norwegian Software Design | Z |
| #10447 | Nosequesoft | Z |
| #22913 | Notting Dale Technology Centre | Z |
| #17578 | Nottingham Software Swap Club | X |
| #10448 | Nottinghamshire Constabulary | Z |
| #10449 | Noumenon Team | Z |
| #10450 | Nova Cultural | Z |
| #10451 | Nova Eletronica | Z |
| #21696 | Nova Inc. | P |
| #10452 | Nova Soft | Z |
| #10453 | Nova Software [1] | Z |
| #10454 | Nova Software [2] | Z |