| Acronym | Definition |
|---|
| ACORN | Association of Community Organizations for Reform Now |
| ACORN | ARC (Australian Research Council) Communications Research Network |
| ACORN | Accelerated Community Oncology Research Network |
| ACORN | Alliance to Conserve Old Richmond Neighborhoods (Virginia) |
| ACORN | Additive Congruential Random Number |
| ACORN | AIDS Community Resource Network |
| ACORN | A Classification Of Residential Neighborhoods (CACI International Inc.) |
| ACORN | Arlington County Online Resource Network (Arlington, VA online library system) |
| ACORN | Aviation, Construction, Ordnance, Repair, Navy |
| ACORN | Automated Correspondence Online Response Network |
| ACORN | Arms Control Research Network |