| ACC | Data | 10 | dictionary.acc |
| ACCDA | Microsoft Access Application | 9 | UTILITY.ACCDA |
| ACCDE | Database | 27 | ACWZLIB.ACCDE |
| ACCDT | Database | 176 | 2 Top.accdt |
| ACCDU | Microsoft Access Application | 18 | ACWZUSR12.ACCDU |
| ACCFL | Microsoft Access Application | 7 | Contacts.accfl |
| ACCFT | Microsoft Access Application | 72 | Address.accft |
| ACCTB | Database | 1 | Core.acctb |
| ACG | Data | 14 | LOGO.ACG |
| ACL | Data | 714 | MsSp7hr.acl |
| ACM | Driver | 63 | vct3216.acm |
| ACS | Video | 20 | rover.acs |
| ADC | Raster Image | 2 | L1033.ADC |
| ADM | System | 30 | dutch.adm |
| ADML | System | 19361 | InetRes.adml |
| ADMX | System | 2011 | Smartcard.admx |
| ADP | Microsoft Access Project | 2 | NorthwindCS.adp |
| AIO | Developer | 3 | hpo5300a.aio |
| AM | Developer | 39 | XCPCDatabase.am |
| AMX | Plugin | 20 | gdi32.amx |
| ANI | System | 173 | sizens.ani |
| AODL | | 3152 | SyncEngine-2020-02-04.1101.5888.1.aodl |
| APL | GIS | 34 | CX_Ftpuploader.apl |
| APM | Raster Image | 11 | M1033DAV.APM |
| APPCACHE | Text | 2 | threshold[1].appcache |
| APPX | Developer | 13 | Microsoft.VCLibs.x86.14.00.BasicAttractLoop.appx |
| ART | CAD | 12 | Magnifier01.art |
| ASCX | Internet Web | 66 | AppSetting.ascx |
| ASD | Backup | 7 | stbillboard.asd |
| ASP | Internet Web | 140 | webcast.asp |
| ASPX | Internet Web | 203 | WebAdminHelp_Internals.aspx |
| AUTOMATICDESTINATIONS-MS | System | 6 | f01b4d95cf55d32a.automaticDestinations-ms |
| AUX | | 724 | System.Runtime.InteropServices.WindowsRuntime.ni.dll.aux |
| AVI | Video | 111 | TV03_FamousMovie_Video.avi |
| AW | Data | 170 | WDMAIN10.AW |
| AX | Dynamic Link Library | 1692 | stQTSource.ax |
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