 | /M |
| /MM |
| Baldridge Award |
| M18N |
| MACH |
| Machinable |
| Machinable Parcel |
| Machine-Aided Translation |
| Machine Capability Index (Cmk) |
| Machine Interpretation (MI) |
| Machine Readable |
| Machine Translation (MT) |
| Machine Translation Plus Translation Memory (MTM) |
| Made-Up Mail |
| Magalogue |
| Magic Arrow |
| Magnetic Tape |
| Magnetic Tape Charge |
| Maiden name |
| Mail |
| Mail (Piece) Volume |
| Mailback Service |
| Mailbag |
| Mailbox |
| Mailchute |
| Mail Class |
| Mail Condition Report |
| Mail Count |
| Mail Cover |
| Mail Date |
| Mail Dollar Sales |
| Mailer |
| Mailer Direct Commission |
| Mailer identifier |
| Mailer Service Bureau |
| Mailers Technical Advisory Committee (MTAC) |
| Mail Fraud |
| Mailgram |
| Mail Handler |
| Mailing |
| Mailing addresses |
| Mailing Agent |
| Mailing date |
| Mailing fee |
| Mailing House |
| Mailing List |
| Mailing List Service |
| Mailing Package |
| Mailing Preference Service, The (MPS) |
| Mailing software |
| Mailing Statement |
| Mail Monitoring |
| Mail Order |
| Mail Order Buyer |
| Mailpiece |
| Mailpiece Quality Control (MQC) |
| Mail Plan |
| Mailpouch |
| Mail Preference Service |
| Mail Preparation Unit |
| Mail Priority |
| Mail Processing |
| Mail Processing Category |
| Mail Processing Equipment |
| Mail Processing Work Credit System (MPWCS) |
| Mail Receptacle |
| Mail Recovery Center (MRC) |
| Mailsack |
| Mail Server |
| Mail Shop |
| Mailsort |
| Mailstop |
| Mail Stop Order |
| Mailstream |
| Mail Transport Equipment (MTE) |
| Mail Transport Equipment Service Center (MTESC) |
| Main Effect |
| Mainframe |
| Main Post Office (MPO) |
| Main Stock |
| Maintainability |
| Major Entity |
| Make Up |
| Malicious Code |
| Mallows Statistics (C-p) |
| Manageability |
| Managed Availability |
| Managed Mail (MM) Tray |
| Managed Mail Program (MMP) |
| Management |
| Management by Knowledge |
| Management Fee |
| Management Instruction (MI) |
| Management Operating Data System (MODS) |
| Management principle |
| Management Review |
| Management Review Board (MRB) |
| Management Sectional Center (MSC) |
| Management System |
| Management Systems Review (MSR) |
| Manager |
| Managerial information steward |
| Managerial Information Stewardship |
| Mandatory Access Control (MAC) |
| Manifest Mailing System (MMS) |
| Manifold Book |
| Man-in-the-Middle Attacks (MITM) |
| Manpower Scheduling and Staffing Program (MSSP) |
| Manual |
| Manual Distribution |
| Manufacturing Resource Planning (MRP) |
| Many-to-Many Relationship |
| Map |
| Map+Measure, Explore+Evaluate, Define+Descibe, Implement+Improve, Control+Conform (MEDIC) |
| Map Projection |
| Map Scale |
| Marginal List Test |
| Marginal Marking |
| Market |
| Market Basket |
| Market Convergence |
| Marketing Information Network (MIN) |
| Marketing Mix |
| Market Penetration |
| Market Potential |
| Market Research |
| Market Resource Management (MRM) |
| Market Segmentation |
| Market Share |
| Mark II |
| Marking |
| Markov Model |
| Mark Sense |
| Markup |
| Markup-Aware |
| Markup Language |
| Marriage Mail |
| Mashup |
| Mass |
| Mass Customization |
| Massing Point |
| Massing Scheme |
| Massively Parallel Processing (MPP) |
| Mass Marketing |
| Mass Media |
| Mass Spectrometer |
| Mass Spectrometry |
| Mass Spectrum |
| Master Black Belt |
| Master Data |
| Master Data Management (MDM) |
| Master File / Masterfile |
| Master Production Schedule (MPS) |
| Master Table |
| Match |
| Matchcode / Match Code |
| Match Definition |
| Matched City Pairs |
| Matching |
| Match Key |
| Match Rate |
| Material Distribution Center (MDC) |
| Material Requirements Planning (MRP) |
| Matrix |
| Matrix Duplicates |
| Matronymic |
| Maximum Cost per Order |
| Maximum Size Standards |
| M-Bag |
| M-Commerce / Mobile Commerce / mCommerce |
| MD5 |
| Mean |
| Meaning-for-Meaning Translation |
| Mean Squared Error |
| Mean Time Between Failures (MTBF) |
| Mean Time to Repair (MTTR) |
| Measure |
| Measurement |
| Measurement and Testing Equipment (M&TE) |
| Measurement curve bundle |
| Measurement system |
| Measurement System Analysis (MSA) |
| Measuring Equipment |
| Mechanical Addressing Systems |
| Mechanical Reject |
| Mechanism |
| Media |
| Media Channel |
| Median |
| Median Demographic Data |
| Medium |
| Megabyte (MB) |
| Mega-Language |
| Member |
| Member Get Member |
| Member Property |
| Memorandum of Agreement (MOA) |
| Memory |
| Memory Effects Error |
| Menu |
| Merchandise Return Service |
| Merchandise Sample |
| Merge |
| Merge/Purge |
| Merge Tag |
| Merging |
| Message Broker |
| Metabase |
| Meta Data / Metadata |
| Metadata Administrator |
| Metadata Dataset |
| Metadata Entity |
| Meta Data Repository / Metadata Repository |
| Metadata Schema |
| Metadata Section |
| Metadata Synchronization / Meta data Synchronization |
| Metadata Translator |
| Metadata Warehouse |
| Meta Muck |
| Meta-tags |
| Metered Mail |
| Metered Postage |
| Meter Reply Mail (MRM) |
| Meter Stamp |
| Meter Tape |
| Method |
| Method 653 |
| Method Blank |
| Method Detection Limit |
| Method of Attribute |
| Method of Payment |
| Methodology |
| Methods Improvement Program - Standard Operating Procedure (MIP-SOP) |
| Metric / Metrics |
| Metricationist |
| Metrology |
| Micro Mark |
| Microsimulation |
| Middleware |
| Mid-Range Check |
| Mid rank |
| Mid-Tier Data Warehouses |
| Migratory-Bird Hunting and Conservation Stamp |
| Milestone |
| Military Lists |
| Military Mail |
| Military Ordinary Mail (MOM) |
| Military Post Office (MPO) |
| Military Post Office Cancellation |
| Millenials |
| Million Instructions per Second (MIPS) |
| Minicatalog |
| Mini Marts |
| Minimum |
| Minimum Order Fee |
| Minimum Order Requirement |
| Minimum Size Standard |
| Mining |
| Mint Set |
| Minutes per Month (MPM) |
| Mirroring |
| Miscoded/Miszipped Mail |
| Misinformation |
| Misinterpretation |
| Missent/Misdirected Mail |
| Missing value |
| Mission |
| Missort/Missorted Mail |
| Mixed Class |
| Mixed Waste |
| Mobile Code |
| Mobile Post Office |
| Mobile Vehicle Repair Facility (MVRF) |
| Mobility Rate |
| Modal interval |
| Mode |
| Model Base |
| Model-Driven Architecture |
| Modeling |
| Modeling/Modelling |
| Modeling Language |
| Modeling Tools |
| Model-View-Controller (MVC) |
| Modular Arrangements of Predetermined Time Standards (MODAPTS) |
| Modulator, Demodulator (MODEM) |
| Module |
| Moment of truth |
| Monetary Value |
| Money Order |
| Monte Carlo |
| Moods Median |
| Morpheme |
| Morphology |
| Mortality Processing |
| Mortality Suppression |
| Mortascreen |
| Mother Tongue |
| Motorist Mailchute |
| Motorized Carrier |
| Motor Vehicle Operator (MVO) |
| Mounted Route |
| Muda |
| Multi-Buyer |
| Multibuyers |
| Multi-byte Character Set (MBCS) |
| Multi-byte Language |
| Multichannel |
| Multi-Channel Marketer |
| Multi-Channel Marketing |
| Multicolinearity |
| Multicommodity Machine (MCM) |
| Multiculturalization / Multiculturalisation |
| Multidimensional Analysis / Multi-Dimensional Analysis |
| Multidimensional Array |
| Multidimensional database (MDDB) / Multi-Dimensional Database |
| Multidimensional Database Management System (MDBMS) |
| Multidimensional Expressions (MDX) |
| Multidimensional Online Analytical Programming (MOLAP) |
| Multidimensional Query Language |
| Multi-Language Vendor (MLV) |
| Multi-level Security |
| Multiline Accuracy Support System (MASS) |
| Multiline Optical Character Reader (MLOCR) |
| Multilingual Workflow |
| Multimedia |
| Multimedia Data |
| Multimedia Messaging Service (MMS) |
| Multinationalization / Multinationalisation (M18N) |
| Multi-part E-mail |
| Multiple Buyers |
| Multiple Dimension Processing |
| Multiple Dwelling |
| Multiple Entry Point Payment System (MEPPS) |
| Multiple Language Vendor |
| Multiple Regression Analysis |
| Multiple Sampling |
| Multiple SICs |
| Multiposition Flat Sorting Machine (MPFSM) |
| Multiposition Letter Sorting Machine (MPLSM) |
| Multivalue Attribute |
| Multi Vari Analysis |
| Multivariate Control Chart |
| Multivariate Testing |
| Multi-Vari Chart |
| Mura |
| Muri |
| Must |
| Mutual Authentication |
| MXD |
| MySQL |
