| Similarity | Rank | |
|---|---|---|
| motif-based | 0.952 | 46138 |
| tooltalk | 0.946 | 57693 |
| iapx-86-based | 0.944 | 51691 |
| svr4-based | 0.939 | 82341 |
| openvms | 0.935 | 31561 |
| netview | 0.935 | 49602 |
| x-windows | 0.935 | 26557 |
| xenix | 0.934 | 53595 |
| mpx | 0.933 | 49934 |
| front-ended | 0.933 | 76867 |
| lu6 | 0.932 | 66217 |
| corp-based | 0.932 | 53022 |
| uniface | 0.931 | 48607 |
| openwindows | 0.930 | 75408 |
| 3000 | 0.930 | 72338 |
| lantastic | 0.929 | 41668 |
| hd-doms | 0.929 | 55500 |
| netbios | 0.929 | 78132 |
| pc-dos | 0.929 | 76178 |
| targon | 0.929 | 82895 |
| debugger | 0.928 | 38130 |
| cadam | 0.928 | 69846 |
| ultrix | 0.928 | 25945 |
| z-mail | 0.928 | 92452 |
| ez-rpc | 0.927 | 81240 |