| 100% | IRS | 3 | Organization that receives 1040 forms: Abbr. |
| 61% | IRS | 3 | Organization that receives 1040s: Abbr. |
| 58% | IRS | 3 | Agency that processes 1040 forms: Abbr. |
| 55% | IRS | 3 | Agency that receives US residents' tax forms: Abbr. |
| 51% | IRS | 3 | Agency that reviews 1040 forms (Abbr.) |
| 47% | IRS | 3 | Government agency that sends out 1040 forms: Abbr. |
| 45% | AAA | 3 | Organization that aids stranded motorists: Abbr. |
| 45% | NASA | 4 | Organization that launched Apollo 11: Abbr. |
| 45% | AAA | 3 | Organization that helps stranded motorists: Abbr. |
| 45% | ADA | 3 | Organization that supports water fluoridation: Abbr. |
| 45% | WMA | 3 | Organization that represents physicians worldwide : Abbr. |
| 45% | NCAA | 4 | Organization that oversees college sports: Abbr. |
| 45% | RIAA | 4 | Organization that combats song piracy: Abbr. |
| 45% | EPA | 3 | Organization that promotes clean air: Abbr. |
| 45% | ADA | 3 | Organization that promotes oral health: Abbr. |
| 45% | FAA | 3 | Organization that manages air traffic: Abbr. |
| 45% | ADA | 3 | Organization that promotes oral hygiene: Abbr. |
| 45% | EPA | 3 | Organization that funds Cleanup Grants: Abbr. |
| 45% | NASA | 4 | Organization that developed space shuttles: Abbr. |
| 45% | AAA | 3 | Organization that offers roadside assistance: Abbr. |
| 45% | AAA | 3 | Organization that provides towing services: Abbr. |
| 45% | CIA | 3 | Organization that gathers foreign intelligence: Abbr. |
| 45% | CIA | 3 | Organization that trained Jason Bourne: Abbr. |
| 45% | PTA | 3 | Organization that does school fundraising: Abbr. |
| 45% | OPEC | 4 | Organization that deals with oil: Abbr. |
| 45% | DEA | 3 | Organization that curbs narcotics trafficking: Abbr. |
| 45% | ACLU | 4 | Organization that defends individuals' rights: Abbr. |
| 45% | ACLU | 4 | Organization that fights for rights: Abbr. |
| 45% | EPA | 3 | Organization that monitors climate change: Abbr. |
| 45% | PETA | 4 | Organization that opposes fur-wearers : Abbr. |