| em | PCEM Electromask Data |
| em$ | Bitware Data |
| em4 | AEM EMS-4 Data |
| em8 | AEM 8860 Engine Management Computer Data |
| em9 | AEM 8860 Engine Management Computer Data |
| email | Microsoft Outlook Express Junkmail Data |
| emap | Genetica Environment Map |
| emar | Emissions Model ASCII Record |
| emb | Wilcom Embroidery Data |
| embl | ENA EMBL Sequence |
| embr | Emissions Model Binary Record |
| emc | Striata Encrypted E-mail Attachment |
| emd | eSignal Market Depth Data |
| emd | POP Peeper E-mail Database |
| emdl | AutoDesk Softimage Export Model |
| emf | EES Macro Data |
| emff | eXtendable Wad Editor EMFF Data |
| emg | Delsys EMGworks Data |
| emi | WeintekHMI EasyBuilder 8000 EMI File |
| emk | PCEM Electromask Data |
| emlx | Apple Mail Message |
| emlxpart | Apple Mail Message Attachment Data |
| emm | EARS Mail Merge Definition |
| emml | EMML Document |
| emmp | EMML Profiles Data |
| emn | Pro/ENGINEER ECAD IDF File |
| emo | Miranda IM Emotions |
| emodel | Delcam PowerSHAPE-E Model |
| emp | eSignal Market Profile Data |
| emp | Medlin Payroll Software Employee Data |
| emrg | E-Prime E-Merge 1.x File |
| emrg2 | E-Prime E-Merge 2.x File |
| ems | eMachineShop Data |
| emsg | SendSafe Saved E-message Data |
| emu | EMU Speech Database |
