| ACROSS | A Comprehensive Resource for Out of Schooltime Staff 
| Others |
| ACROSS | Accelerated Commercial Release Operating Support System
| Others |
| ACROSS | Accelerated Customs Release Operations Support System
| Others |
| ACROSS | Accurately Controlled Routine Operated Signal System
| Others |
| ACROSS | Accurately Controlled Routinely Operated Signal System
| Others |
| ACROSS | Anglican Crisis Relief Outreach Support Singapore
| Others |
| ACROSS | Association of Christian Resource Organizations Serving Sudan
| Others |
| ACROSS | Association of Christians Reaching Out in Service and Support
| Others |
| ACROSS | Automated Cargo Release Operations Service System
| Others |