****** 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 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 Arms Control Research Network
* ACORN Automated Correspondence Online Response Network
