| MASC | Massachusetts Association of School Committees | 马萨诸塞州学校委员会协会 |
| MASC | Marketing Association Of Seneca College | 塞内卡学院营销协会 |
| MASC | Michigan Association of Student Councils | 密歇根州学生委员会协会 |
| MASC | Municipal Association of South Carolina | 南卡罗来纳州市政协会 |
| MASC | Marine Aquarium Society of Colorado (web forum) | 科罗拉多州海洋水族馆协会（网络论坛） |
| MASC | Massachusetts Association of Student Councils | 马萨诸塞州学生委员会协会 |
| MASC | Michigan Association of Senior Centers | 密歇根州老年中心协会 |
| MASC | Maryland Association of Student Councils | 马里兰学生委员会协会 |
| MASC | Michigan Association of Service Coordinators | 密歇根服务协调员协会 |
| MASC | Michigan Association of Student Councils (Lansing, Michigan) | 密歇根州学生委员会协会（密歇根州兰辛） |
| MASC | Maximum Allowable Stack Concentration | 最大允许烟囱浓度 |
| MASC | Maintenance and Support Concept | 维护和支持概念 |
| MASC | Myomer Accelerator Signal Circuitry (Mechwarrior Universe games) | Myomer加速器信号电路（Mechwarrior宇宙游戏） |
| MASC | Modeling Analysis & Simulation Center | 模拟分析和仿真中心 |
| MASC | Multicast Address-Set Claim (protocol) | 多播地址集声明（协议） |
| MASC | Mountain Administrative Support Center | 山区行政支持中心 |
| MASC | Myomer Accelerator Signal Circuitry | 肌球蛋白加速器信号电路 |
| MASC | Male Abuse Survivors Centre | 男性虐待幸存者中心 |
| MASC | Matsushita Avionics Systems Corporation | 松下航空电子系统公司 |
| MASC | Marconi Advanced Scrambler | 马可尼高级扰频器 |
| MASC | Master of Applied Science | 应用科学硕士 |
| MASC | Massachusetts Avenue Surgery Center (Bethesda, MD) | 马萨诸塞大道外科中心（马里兰州贝塞斯达） |
| MASC | Multiple-Award Schedule Contract | 多重奖励计划合同 |
| MASC | Myotube-Associated Specificity Component | 肌管相关特异性成分 |
| MASC | Mission and Safety Critical | 任务和安全关键 |
| MASC | Multiple Access Source Code | 多重访问源代码 |
| MASC | Multiarray Signal Conditioner | 多阵列信号调节器 |
| MASC | Marine Air Ground Task Force Automated Service Center | 海军陆战队空地特遣部队自动化服务中心 |
| MASC | Multidimensional Anxiety Scale for Children | 儿童多维焦虑量表 |
| MASC | Multiple-Antenna Signal Constellation | 多天线信号星座 |
| MASC | Maintenance Support Concept | 维护支持概念 |