| 100% | TSARISM | 7 | System that collapsed in 1917 |
| 75% | TSARISM | 7 | System that ended in 1917 |
| 53% | BARINGS | 7 | __ Bank, institution that collapsed in 1995 |
| 52% | ENRON | 5 | US energy company that collapsed in 2001 |
| 52% | TSARS | 5 | Line that ended in 1917 |
| 47% | UNIX | 4 | Operating system that succeeded TOPS-10 in usage |
| 47% | YOGA | 4 | Exercise system that originated in India |
| 46% | UBUNTU | 6 | Linux operating system that means "humanity" in certain African languages |
| 45% | ASDIC | 5 | Underwater detection system that started being produced in England in 1922 |
| 44% | METRO | 5 | Underground railway system, such as that in Paris |
| 43% | ACOL | 4 | Popular British bridge bidding system that started to evolve in the mid-1930s |
| 41% | WINDOWS | 7 | Microsoft operating system that came out in 1985 and now dominates the personal computer market |
| 41% | YOGA | 4 | System of exercise that originated in India |
| 41% | RANKING | 7 | A system that determines how good a player is as compared to others in sports, say |
| 41% | CPM | 3 | Operating system that preceded DOS, created in 1974 and used on Intel 8080/85-based microcomputers |
| 38% | MATAHARI | 8 | She was executed in 1917 |
| 38% | MATAHARI | 8 | Exotic dancer executed in 1917 |
| 38% | PLOTZ | 5 | Collapse in frustration |
| 38% | WHITESOX | 8 | Chicago MLB team that won the World Series in 1906, 1917, and 2005 (2 wds.) |
| 37% | SPRINKLER | 9 | System that waters lawn |
| 37% | USENET | 6 | System that popularized ''FAQ'' |
| 37% | JOBROTATION | 11 | System that varies tasks* |
| 37% | OLFACTORY | 9 | System that controls smell |
| 37% | CHOKE | 5 | Collapse in the clutch |
| 37% | CAVE | 4 | Collapse in under pressure |
| 37% | VIMYRIDGE | 9 | Battle of —, conflict in April, 1917 that saw a decisive Allied victory in World War I |
| 37% | ARLO | 4 | Collapsed in Sunbeams artist ___ Parks |
| 37% | LAN | 3 | System that connects computers: Abbr. |
| 37% | SPRINKLER | 9 | System that waters plants automatically |
| 36% | THEDABARA | 9 | 58-Across player in 1917 |