| 1 | PostScript |
| 1 | Gzipped PostScript |
| 2 |
| 1 | Commands |
| 2 | System and library calls |
| 3 | Devices |
| 4 | File servers |
| 5 | Plan 9 File Protocol, 9P |
| 6 | File formats, misc |
| 7 | Databases |
| 8 | System administration |
(The search is for the conjunction of the space separated keywords.)