| M4A | Audio | 9633 | Skype_Dtmf_star_Loud.m4a |
| MAP | Game | 3408 | Microtek 1850.map |
| MAPIMAIL | System | 7 | Mail Recipient.MAPIMail |
| MAPSTYLE | Data | 1 | style.MapStyle |
| MAR | Database | 3 | signup.mar |
| MASTER | Internet Web | 36 | webAdminNoButtonRow.master |
| MCC | Video | 10 | Microsoft PowerPoint 95 Forum.mcc |
| MCXML | | 220 | Office.x-none.msi.16_mondoww.mcxml |
| MD | Developer | 1889 | jqueryUI.md |
| MDA | Plugin | 6 | UTILITY.MDA |
| MDB | Microsoft Access Application | 65 | mibraca.mdb |
| MDE | Plugin | 6 | ACWZMAIN.MDE |
| MDL | Data | 124 | w_smg_mp5.mdl |
| MDT | Database | 5 | ACWZUSR.MDT |
| MDW | Microsoft Access Application | 1 | system.mdw |
| MDZ | Data | 42 | ledger.mdz |
| METADATA | Data | 17 | goog-downloadwhite-proto.metadata |
| MFL | Data | 1227 | dnsclientpsprovider.mfl |
| MHT | Internet Web | 63 | fixed_box.mht |
| MIB | | 1 | Makefile.mib |
| MID | Audio | 2350 | fpc_rock_65.mid |
| MKD | CAD | 1020 | PfPre_f9cb4963.mkd |
| MLLR | Audio | 8 | l2057.mllr |
| MMF | Data | 2 | HelpCtr.mmf |
| MML | Dynamic Link Library | 33 | CAGCAT.MML |
| MMW | Dynamic Link Library | 33 | CAGCAT.MMW |
| MNI | Data | 6 | ResCache.mni |
| MOD | Audio | 88 | ktkm32.mod |
| MODEL | CAD | 723 | Url.model |
| MOF | Text | 1650 | wsp_fs.mof |
| MP3 | Audio | 2115 | buzzer.mp3 |
| MSC | Executable Application | 153 | dfrg.msc |
| MSG | Text | 587 | ru_ua.msg |
| MSHC | Windows Help | 24 | Help3Branding-IE6.mshc |
| MSHI | Windows Help | 20 | clientserver.mshi |
| MSI | Installer | 869 | 1efe6.msi |
| MSO | Data | 2 | extension.mso |
| MSP | Windows Installer Patch | 55 | qfe31927.msp |
| MSS | Developer | 3 | Aero.msstyles_1033_96_01.mss |
| MSSTYLES | Dynamic Link Library | 18 | Blade.msstyles |
| MST | Executable Application | 728 | 1035.mst |
| MSU | | 126 | Windows8.1-KB3118401-x86.msu |
| MTL | 3D Image | 174 | Vschild_vorfahrt.mtl |
| MUI | Dynamic Link Library | 138887 | CNBBR187.DLL.mui |
| MYDOCS | System | 6 | My Documents.mydocs |
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