| HMCS | Her Majesty's Colonial Ship | 女王陛下的殖民地的船 |
| HMCS | High Maltose Corn Syrup | 高麦芽糖玉米糖浆 |
| HMCS | Hydrometrocolpos, Postaxial Polydactyly, and Congenital Heart Malformation | 子宫积水、轴后多指畸形和先天性心脏畸形 |
| HMCS | Her Majesty's Canadian Ship (Canada) | 女王陛下的加拿大的船(加拿大) |
| HMCS | Helmet Mounting Cueing System | 头盔安装提示系统 |
| HMCS | His/Her Majesty's Civil Service | 他/她的威严的公务员 |
| HMCS | Her/His Majesty's Canadian Ship | 她/他的威严的加拿大的船 |
| HMCS | Her Majesty's Canadian Ship | 加拿大皇家海军舰艇 |
| HMCS | Her Majesty's Courts Service (UK) | 女王陛下的法庭服务(英国) |
| HMCS | Harmonised Mandatory Control System | 统一强制控制系统 |
| HMCS | Senior Chief Hospital Corpsman (Naval Rating) | 高级首席医院医务官（海军等级） |