| MASC | Male Abuse Survivors Centre 
| Others |
| MASC | Mammary Analogue Secretory Carcinoma
| Others |
| MASC | Management Account Structure Codes
| Others |
| MASC | Manitoba Agricultural Services Corporation
| Others |
| MASC | Manually Annotated Sub Corpus
| Others |
| MASC | Manually Annotated Sub-Corpus
| Others |
| MASC | Manuscripts Archives And Special Collections
| Others |
| MASC | Marine Aquarium
| Others |
| MASC | Marine Aquarium Society Of Colorado
| Others |
| MASC | Marketing Association of Seneca College
| Others |
| MASC | Maryland Association of Student Councils
| Others |
| MASC | Mas Controller
| Others |
| MASC | masculine
| Others |
| MASC | Massachusetts Association of School Committees
| Others |
| MASC | Massachusetts Association of Student Councils
| Others |
| MASC | Math and Science Challenge
| Others |
| MASC | Medical Academic Staff Committee
| Others |
| MASC | Medical Advisers Support Centre
| Others |
| MASC | Member of Associated Stress Consultants (UK)
| Others |
| MASC | Michigan Association of Student Councils
| Others |
| MASC | Micro Architecture at Santa Cruz
| Others |
| MASC | Micro Architecture Santa Cruz
| Others |
| MASC | Microsoft Access Script Command
| Others |
| MASC | Mid-American Soccer Classic
| Others |
| MASC | Midget And Sprite Club
| Others |
| MASC | Midwest Alliance Soccer Conference
| Others |
| MASC | Military Audiology Short Course
| Others |
| MASC | Minimal Access Surgery Center
| Others |
| MASC | Minnesota Association of Student Councils
| Others |
| MASC | Missouri Association of Student Councils
| Others |
| MASC | Mitsubishi Active Stability Control
| Others |
| MASC | Modular Advanced Signal Channelizer
| Others |
| MASC | Monitoring and Security of Containers
| Others |
| MASC | Monroe Actors Stage Company
| Others |
| MASC | Mountain Administrative Support Center
| Others |
| MASC | Movies Anime Shows Comics
| Others |
| MASC | Multi Agent Satisficing Control
| Others |
| MASC | Multi Angle Snowflake Camera
| Others |
| MASC | Multicast Address Set Claim
| Others |
| MASC | Multicultural Arts for Schools and Communities
| Others |
| MASC | Multinational Arabidopsis Steering Committee
| Others |
| MASC | Multiple Active Site Correction
| Others |
| MASC | Municipal Association of South Carolina
| Others |
| MASC | Myomer Accelerator Signal Circuitry
| Others |