| MMO | Multionedia Outlet | 多媒体插座 |
| MMO | Middle Machine Oil | 中质机械油 |
| MMO | Massively Multiplayer Online | 大型多人在线 |
| MMO | Modifications, Maintenance and Operations | 修改、维护和操作 |
| MMO | Mission Operation Management Organization | 任务运行管理组织 |
| MMO | Minimum Municipal Obligation (municipal pension funds) | 最低市政义务（市政养老基金） |
| MMO | Means, Motive and Opportunity | 手段、动机和机会 |
| MMO | Maintenance Manual Organization Level (TMINS) | 维护手册组织级别（TMINS） |
| MMO | Motorcycle Museum Online | 摩托车博物馆在线 |
| MMO | Maden MÜhendisleri Odasý | Maden MÜhendisleri Odasý |
| MMO | Multimedia Object | 多媒体对象 |
| MMO | Mixed Metal Oxide | 混合金属氧化物 |
| MMO | Multimedia Outlet | 多媒体插座 |
| MMO | Materials and Manufacturing Ontario | 安大略省材料和制造业 |
| MMO | Minor Maintenance Order | 次要维护订单 |
| MMO | Mobility Movement Order | 移动性移动顺序 |
| MMO | Mach Max Operating (aviation) | 最大运行马赫数（航空） |
| MMO | Man-Made Object | 人造物体 |
| MMO | Maximum Operating Mach Number | 最大作战马赫数 |
| MMO | Mars Mining Operations (Dark Orbit game) | 火星采矿行动（黑暗轨道游戏） |
| MMO | Mercy Medical Operations | 慈善医疗运营 |
| MMO | Maio, Cape Verde Islands | 马约，佛得角群岛 |
| MMO | Memo | 备忘录 |
| MMO | Maintenance Management Officer | 维修保养管理军官 |
| MMO | Main Mechanical Outfitting | 主要机械装备 |
| MMO | MIPR Management Office | MIPR管理办公室 |
| MMO | Maximum Magnitude of the OCC (Odd Crosscorrelation) | OCC的最大幅度（奇互相关） |
| MMO | Massively Multiplayer Online (gaming) | 大规模多人在线（游戏） |
| MMO | Modem Managed Object | 调制解调器管理对象 |
| MMO | Mixed Mode Optimal (voting algorithm) | 混合模式最优（投票算法） |
| MMO | Magnetic Method of Orientation (directional drilling compass type) | 磁性定向方法（定向钻井罗盘型） |
| MMO | Missouri Missions Offering | 密苏里任务提供 |
| MMO | Memo writer file (RapidFile) | 备忘录编写器文件（RapidFile） |
| MMO | Music Minus One | 缺一音乐 |
| MMO | Mercury Magnetospheric Orbiter | 水星磁层轨道器 |
| MMO | Marvel Mystery Oil | 漫威神秘油 |
| MMO | Maintenance Material Officer | 维护材料员 |
| MMO | Mass Multiplayer Online | 大规模多人在线 |
| MMO | Marine Mammals Observers | 海洋哺乳动物观察员 |
| MMO | Massive Multiplayer Online | 大规模多人在线 |
| MMO | Materials Management Office | 物资管理办公室 |
| MMO | Monthly Market Outlook | 月度市场展望 |
| MMO | Multimodel optimization | 多模型优化 |