| M091 | MXML | Macromedia Extensible Markup Language | XML-based language for defining user interfaces in Adobe Flex. | Used in Flash and Flex web applications. |
| M092 | MACD | Move, Add, Change, Delete | Term used in telecom and IT change management. | Used in provisioning network services. |
| M093 | MADC | Multiplying Analog-to-Digital Converter | ADC that multiplies an analog signal by a digital value. | Used in signal processing hardware. |
| M094 | MAE | Mean Absolute Error | Metric for evaluating prediction accuracy in statistics. | Used in regression and AI models. |
| M095 | MAPIX | Message API Extended | Enhanced MAPI standard for mail communication. | Used in advanced email client servers. |
| M096 | MARC | Machine-Readable Cataloging | Digital format for bibliographic data. | Used in library management systems. |
| M097 | MASINT | Measurement and Signature Intelligence | Intelligence gathering using scientific sensors. | Used in military reconnaissance. |
| M098 | MATV | Master Antenna Television | Shared television signal system for buildings. | Used in hotels and apartment complexes. |
| M099 | MAVEN | Mars Atmosphere and Volatile EvolutioN | NASA mission studying Mars’ upper atmosphere. | Used in space research and planetary science. |
| M100 | MAWP | Maximum Allowable Working Pressure | Maximum pressure vessel limit for safe operation. | Used in mechanical engineering and safety testing. |
| M101 | MBaaS | Mobile Backend as a Service | Cloud service providing backend for mobile apps. | Used in mobile app development platforms. |
| M102 | MBAE | Malwarebytes Anti-Exploit | Security tool to prevent exploit-based attacks. | Used in enterprise cybersecurity. |
| M103 | MBB | Mobile Broadband | Wireless high-speed internet access through cellular networks. | Used in 4G and 5G networks. |
| M104 | MBF | Million Board Feet | Unit of measure in lumber industry. | Used in forestry and construction industries. |
| M105 | MBI | Management by Inspiration | Leadership style focused on motivating teams. | Used in modern corporate leadership. |
| M106 | MBIST | Memory Built-In Self-Test | On-chip testing of memory components for errors. | Used in semiconductor manufacturing. |
| M107 | MBMS | Multimedia Broadcast Multicast Service | Mobile network technology for broadcasting multimedia. | Used in LTE and 5G broadcasting. |
| M108 | MBPS | Megabits Per Second | Unit of network data transfer rate. | Used in internet speed measurements. |
| M109 | MBT | Model-Based Testing | Testing technique based on models of system behavior. | Used in software engineering QA. |
| M110 | MCAD | Mechanical Computer-Aided Design | Software for designing mechanical components. | Used in SolidWorks and AutoCAD Mechanical. |
| M111 | MCAS | Maneuvering Characteristics Augmentation System | Flight control system used in aircraft. | Used in Boeing 737 MAX jets. |
| M112 | MCC | Mobile Country Code | Numeric identifier representing a country in mobile networks. | Used in SIM and cellular network IDs. |
| M113 | MCD | Magnetic Card Device | Reader for magnetic stripe cards. | Used in ATMs and payment terminals. |
| M114 | MCE | Machine Check Exception | Hardware error detected by a processor. | Used in CPU fault diagnosis. |
| M115 | MCH | Memory Controller Hub | Chipset component managing memory operations. | Used in computer motherboard architecture. |
| M116 | MCL | Maximum Contaminant Level | Highest allowable concentration of a contaminant in water. | Used in EPA environmental standards. |
| M117 | MCM | Multi-Chip Module | Single package containing multiple integrated circuits. | Used in high-performance computing. |
| M118 | MCN | Manufacturer Catalog Number | Unique identifier for manufacturer’s product. | Used in industrial supply chains. |
| M119 | MCP | Microchannel Plate | Device that amplifies electrons for imaging. | Used in night-vision and particle detectors. |
| M120 | MCR | Maintenance Control Room | Centralized system managing equipment status. | Used in industrial and aviation facilities. |
| M121 | MCS | Modulation and Coding Scheme | Defines modulation type and error correction in wireless communication. | Used in LTE and 5G signal systems. |
| M122 | MCUH | Multi-Controller Unit Hub | Central hub coordinating multiple microcontrollers. | Used in automotive and robotics systems. |
| M123 | MDA | Mail Delivery Agent | Software that delivers email to a recipient’s mailbox. | Used in email systems like Postfix. |
| M124 | MDFI | Multi-Dimensional File Indexing | Advanced indexing for multi-dimensional databases. | Used in data analytics and GIS. |
| M125 | MDIO | Management Data Input/Output | Serial bus used for managing Ethernet PHY devices. | Used in embedded networking hardware. |
| M126 | MDL | Model Description Language | Used for describing simulation and control models. | Used in MATLAB Simulink. |
| M127 | MDMF | Multiple Data Message Format | Caller ID transmission format. | Used in telephone systems. |
| M128 | MDP | Mobile Data Platform | Backend infrastructure for managing mobile data. | Used by app developers and ISPs. |
| M129 | MDR | Mean Daily Requirement | Average nutrient requirement per day. | Used in food and health industries. |
| M130 | MDSD | Model-Driven Software Development | Software development approach based on abstract models. | Used in enterprise application development. |
| M131 | MDTF | Multi-Donor Trust Fund | Pooled funding mechanism for international projects. | Used in UN and World Bank programs. |
| M132 | MEA | Middle East and Africa | Geographic business region grouping. | Used in multinational corporate reports. |
| M133 | MEC | Multi-access Edge Computing | Computing paradigm that brings computation near users. | Used in 5G and IoT systems. |
| M134 | MED | Minimum Effective Dose | Smallest dose producing a desired effect. | Used in pharmacology and toxicology. |
| M135 | MEF | Metro Ethernet Forum | Standards organization for carrier Ethernet. | Used in telecom infrastructure. |
| M136 | MEID | Mobile Equipment Identifier | Unique hardware identifier for CDMA devices. | Used by carriers to track devices. |
| M137 | MEM | Memory | Component that stores data or instructions. | Used in RAM, ROM, and flash devices. |
| M138 | MEN | Metropolitan Ethernet Network | City-wide Ethernet service. | Used in enterprise connectivity. |
| M139 | MEP | Manufacturing Execution Protocol | Industrial protocol managing production workflows. | Used in factory automation. |
| M140 | MESFET | Metal Semiconductor Field Effect Transistor | High-frequency transistor for RF applications. | Used in satellite and radar systems. |
| M141 | METAR | Meteorological Aerodrome Report | Aviation weather report format. | Used by pilots and air traffic control. |
| M142 | MFA | Multi-Factor Authentication | Security system using multiple authentication methods. | Used in online banking and logins. |
| M143 | MFB | Multi-Functional Board | Electronic board supporting multiple functions. | Used in robotics and embedded systems. |
| M144 | MFD | Multi-Function Device | Device combining printing, scanning, copying, and faxing. | Used in office printing systems. |
| M145 | MFGT | Manufacturing Technology | Processes and tools for producing goods. | Used in industrial automation. |
| M146 | MFI | Microfinance Institution | Organization providing small-scale financial services. | Used in rural development programs. |
| M147 | MFL | Magnetic Flux Leakage | Non-destructive testing method for detecting flaws in metals. | Used in pipeline inspection. |
| M148 | MFP | Multi-Functional Printer | Printer combining scanning, faxing, and copying. | Used in offices and print centers. |
| M149 | MFSK | Multiple Frequency-Shift Keying | Digital modulation method using multiple frequencies. | Used in radio data transmission. |
| M150 | MFTS | Multi-Frequency Tone Signaling | Signaling method using multiple audio tones. | Used in telecommunication switching systems. |
| M151 | MGCP | Media Gateway Control Protocol | Protocol for controlling media gateways on IP networks. | Used in VoIP architecture. |
| M152 | MGE | Modular Grid Energy | Flexible renewable energy storage system. | Used in solar and wind energy plants. |
| M153 | MGF | Mean Growth Factor | Measurement of growth over time. | Used in biology and economics. |
| M154 | MGMT | Management | Coordinating activities to achieve organizational goals. | Used in corporate operations. |
| M155 | MHEG | Multimedia and Hypermedia Information Coding Expert Group | Standard for interactive TV applications. | Used in broadcast television systems. |
| M156 | MHL | Mobile High-Definition Link | Standard for transmitting HD video and audio from mobile devices. | Used in smartphones and TVs. |
| M157 | MHS | Message Handling System | Framework for exchanging electronic messages. | Used in email and telegraph systems. |
| M158 | MIBS | Modular Information Base System | Hierarchical data management structure. | Used in SNMP network monitoring. |
| M159 | MID | Mobile Internet Device | Handheld device for web browsing and multimedia. | Used in portable computing markets. |
| M160 | MIG | Metal Inert Gas | Welding process using inert shielding gas. | Used in industrial fabrication. |
| M161 | MILS | Multiple Independent Levels of Security | Architecture ensuring data separation across security levels. | Used in defense computing. |
| M162 | MIMEA | Multipurpose Internet Mail Extensions Architecture | Framework for transmitting different content types. | Used in web and mail protocols. |
| M163 | MIMO-OFDM | Multiple Input Multiple Output – Orthogonal Frequency Division Multiplexing | Combines MIMO and OFDM for efficient wireless transmission. | Used in 4G/5G networks. |
| M164 | MIS | Management Information System | Computerized system for managing business data. | Used in enterprise management. |
| M165 | MIT | Massachusetts Institute of Technology | Prestigious technology university in the USA. | Known for research in AI and robotics. |
| M166 | MKDIR | Make Directory | Command for creating directories in file systems. | Used in Linux and Windows command lines. |
| M167 | MLAA | Morphological Anti-Aliasing | Graphics technique reducing jagged edges in rendering. | Used in video game graphics engines. |
| M168 | MLC | Multi-Level Cell | Type of NAND flash memory storing multiple bits per cell. | Used in SSDs and USB drives. |
| M169 | MLE | Maximum Likelihood Estimation | Statistical method for parameter estimation. | Used in AI and econometrics. |
| M170 | MLMQ | Multi-Level Marketing Queue | Structured sales queue system. | Used in network marketing automation. |
| M171 | MLR | Multi-Layer Router | Router that handles multiple protocol layers. | Used in advanced IP networks. |
| M172 | MLSR | Multi-Layer Secure Router | Router ensuring end-to-end encrypted communication. | Used in government and defense. |
| M173 | MLT | Multi-Layer Transformer | Deep learning architecture improving model performance. | Used in AI natural language processing. |
| M174 | MMDS | Multichannel Multipoint Distribution Service | Wireless system for TV and broadband transmission. | Used in rural broadband networks. |
| M175 | MMEP | Multimedia Messaging Enhancement Protocol | Protocol improving MMS delivery. | Used in mobile messaging. |
| M176 | MMIOS | Memory-Mapped Input Output System | System using shared address space for memory and I/O devices. | Used in embedded system design. |
| M177 | MMU | Memory Management Unit | Hardware that handles virtual memory and address translation. | Used in CPUs and embedded processors. |
| M178 | MNA | Multi-Network Adapter | Device for connecting multiple networks. | Used in data centers. |
| M179 | MNPV | Modified Net Present Value | Financial metric adjusting for investment timing. | Used in capital budgeting. |
| M180 | MOA | Memorandum of Agreement | Document defining mutual agreement between parties. | Used in corporate partnerships. |
| M181 | MOE | Margin of Error | Statistical range indicating estimate uncertainty. | Used in surveys and analytics. |
| M182 | MOFET | Metal Oxide Field Effect Transistor | Semiconductor used in amplification and switching. | Used in power electronics. |
| M183 | MOOC | Massive Open Online Course | Online learning course open to all participants. | Used in e-learning platforms like Coursera. |
| M184 | MOSAIC | Modular Open Systems Approach Integration Consortium | Standardization framework for modular architectures. | Used in defense systems. |
| M185 | MOT | Ministry of Transport | Government department regulating transportation. | Used in vehicle inspection and licensing. |
| M186 | MOVAL | Movement Authorization Level | Security clearance or permission level. | Used in restricted industrial sites. |
| M187 | MPA | Master of Public Administration | Graduate degree focusing on public service management. | Used by government officials. |
| M188 | MPC | Multi-Party Computation | Cryptographic protocol enabling joint data processing. | Used in privacy-preserving blockchain systems. |
| M189 | MPEG-DASH | Dynamic Adaptive Streaming over HTTP | Streaming standard adjusting video quality dynamically. | Used in YouTube and Netflix streaming. |
| M190 | MPL | Mozilla Public License | Open-source license allowing code modification. | Used in Firefox and open-source projects. |
| M191 | MPM | Multi-Processing Module | System handling parallel data processing. | Used in supercomputing clusters. |
| M192 | MPP | Massively Parallel Processing | Architecture with many processors handling separate tasks. | Used in big data analytics. |
| M193 | MPR | Multi-Protocol Router | Router supporting different networking protocols. | Used in hybrid network environments. |
| M194 | MPS | Managed Print Services | Outsourced management of printing devices. | Used in enterprises for cost reduction. |
| M195 | MPTCP | MultiPath TCP | TCP extension that enables multiple paths per connection. | Used in mobile and Wi-Fi bonding. |
| M196 | MRCP | Media Resource Control Protocol | Protocol for controlling media servers in VoIP. | Used in speech recognition and IVR. |
| M197 | MRTG | Multi Router Traffic Grapher | Tool for monitoring network traffic using SNMP. | Used in IT network administration. |
| M198 | MSB | Most Significant Bit | The bit with the highest value position in binary notation. | Used in digital computing and encryption. |
| M199 | MSCI | Morgan Stanley Capital International | Global provider of financial indexes and analysis. | Used in investment benchmarking. |
| M200 | MUXDEMUX | Multiplexer-Demultiplexer | Device that combines and separates multiple data streams. | Used in communication and broadcasting systems. |