| Acronym | Definition |
|---|
| CISL | Computational and Information Systems Laboratory |
| CISL | Computational & Information Systems Laboratory (National Center for Atmospheric Research; Boulder, CO) |
| CISL | Confédération Internationale des Syndicats Libres (French) |
| CISL | Continental Indoor Soccer League (1993-1997) |
| CISL | Centre International de Séjour de Lyon (French: Lyon International Center for Living; Lyon, France) |
| CISL | Center for Improvement of Student Learning (Washington) |
| CISL | Common Intrusion Specification Language |
| CISL | Confederazione Italiana dei Sindicati Lavoratori (Italian Confederation of Workers' Trade Unions) |
| CISL | Common Intelligence Services Layer |
| CISL | Carol Info Services Limited (Mumbai, India) |