| 100% | DECIMAL | 7 | Dewey's pre Internet book categorizing system |
| 42% | USENET | 6 | Pre internet communication system |
| 37% | DECIMAL | 7 | Dewey __ System organizes books in the library |
| 30% | INDEXING | 8 | Categorizing; arranging a book's information A-Z |
| 28% | SCROLL | 6 | Pre-book book |
| 28% | DOUBLEENTRY | 11 | Book-keeping system |
| 27% | BART | 4 | S.F. train system |
| 27% | BART | 4 | S.F. commuting system |
| 26% | DSL | 3 | Pre-fiber internet option: Abbr. |
| 26% | MSDOS | 5 | Pre-Windows operating system: Hyph. |
| 26% | CZARISM | 7 | System of Russian rule pre-1917 |
| 25% | ARTS | 4 | The 700s, in the Dewey Decimal System |
| 25% | OYEZOYEZ | 8 | Pre-P.A. system attention-getting yell |
| 25% | SCLEROSIS | 9 | S in the immune system disease MS |
| 25% | SCROOGEMCDUCK | 13 | Wealthy comic book character who's related to Huey, Dewey, and Louie: 2 wds. |
| 25% | JUPITER | 7 | "___ War," Neal Asher book featuring the solar system's largest planet in its title |
| 24% | LEET | 4 | System of modified spellings used on the internet |
| 24% | GENERAL | 7 | Estates __, French political system pre-1789 |
| 24% | ESTATES | 7 | __ General, French political system pre-1789 |
| 24% | UNIX | 4 | Operating system on many Internet servers |
| 24% | UNIX | 4 | Operating system for many Internet servers |
| 24% | DNS | 3 | "Phone book" of the internet, briefly |
| 24% | ANDES | 5 | Major mountain system of S America |
| 24% | BART | 4 | S.F. commuter train system |
| 24% | IMPERIALWOMAN | 13 | Pearl S. Buck book |
| 24% | THELIVINGREED | 13 | Pearl S. Buck book |
| 24% | SNAILMAIL | 9 | System that was called 34-Across before the Internet |
| 24% | CDN | 3 | System of servers created for faster Internet use: Abbr. |
| 23% | LIBRARY | 7 | The Dewey Decimal system is used here |
| 23% | NRA | 3 | Ulysses S. Grant was its eighth pres. |