| CISL | ConfÉdÉration Internationale des Syndicats Libres (French) | ConfÉdÉration Internationale des Syndicats Libres (French) |
| CISL | Common Intelligence Services Layer | 公共智能服务层 |
| CISL | Common Intrusion Specification Language | 通用入侵规范语言 |
| CISL | Confederazione Italiana dei Sindicati Lavoratori (Italian Confederation of Workers' Trade Unions) | Confederazione Italiana Sindicati天主Lavoratori(意大利联盟工人工会) |
| CISL | Cleveland, Indianapolis, and St. Louis Railway Company | 克利夫兰、印第安纳波利斯和圣路易斯铁路公司 |