| Extension | Filbeskrivelse |
| .INP | Datafiler |
| .IP | Datafiler |
| .IPFIX | Datafiler |
| .IPKG | Datafiler |
| .IROCK | Datafiler |
| .IRP | Datafiler |
| .IRX | Datafiler |
| .IS? | Datafiler |
| .ISF | Datafiler |
| .IST | Datafiler |
| .ITE | Datafiler |
| .ITL | Datafiler |
| .ITM | Datafiler |
| .ITX | Datafiler |
| .IVC | Datafiler |
| .IVD | Datafiler |
| .IW | Datafiler |
| .IX2 | Datafiler |
| .IXB | Datafiler |
| .JBI | Datafiler |
| .JDB | Datafiler |
| .JEF | Datafiler |
| .JLT | Datafiler |
| .JMP | Datafiler |
| .JNT | Datafiler |
| .JOBOPTIONS | Datafiler |
| .JODA | Datafiler |
| .JOINED | Datafiler |
| .JPH | Datafiler |
| .JRXML | Datafiler |
| .JSONML | Datafiler |
| .KAP | Datafiler |
| .KARBON | Datafiler |
| .KATE | Datafiler |
| .KBS | Datafiler |
| .KDBX | Datafiler |
| .KDC | Datafiler |
| .KFO | Datafiler |
| .KIA | Datafiler |
| .KID | Datafiler |
| .KMY | Datafiler |
| .KNO | Datafiler |
| .KNP | Datafiler |
| .KPF | Datafiler |
| .KPP | Datafiler |
| .KPR | Datafiler |
| .KPX | Datafiler |
| .KPXX | Datafiler |
| .KTH | Datafiler |
| .L16 | Datafiler |
| .L6T | Datafiler |
| .LACCDB | Datafiler |
| .LAS | Datafiler |
| .LASXML | Datafiler |
| .LBX | Datafiler |
| .LCD | Datafiler |
| .LCM | Datafiler |
| .LD2 | Datafiler |
| .LDF | Datafiler |
| .LDIF | Datafiler |
| .LEX | Datafiler |
| .LFP | Datafiler |
| .LGF | Datafiler |
| .LGH | Datafiler |
| .LGI | Datafiler |
| .LIB | Datafiler |
| .LIF | Datafiler |
| .LIFE | Datafiler |
| .LIVEREG | Datafiler |
| .LIVEUPDATE | Datafiler |
| .LIX | Datafiler |
| .LLB | Datafiler |
| .LMS | Datafiler |
| .LMX | Datafiler |
| .LNG | Datafiler |
| Extension | Filbeskrivelse |
| .LOC | Datafiler |
| .LOSTXML | Datafiler |
| .LP7 | Datafiler |
| .LPP | Datafiler |
| .LRF | Datafiler |
| .LRS | Datafiler |
| .LRX | Datafiler |
| .LSL | Datafiler |
| .LSP | Datafiler |
| .LSR | Datafiler |
| .LST | Datafiler |
| .LVM | Datafiler |
| .LVW | Datafiler |
| .LW4 | Datafiler |
| .LY | Datafiler |
| .MADS | Datafiler |
| .MAI | Datafiler |
| .MBD | Datafiler |
| .MBG | Datafiler |
| .MBL | Datafiler |
| .MBP | Datafiler |
| .MBX | Datafiler |
| .MC1 | Datafiler |
| .MCD | Datafiler |
| .MD8 | Datafiler |
| .MDZ | Datafiler |
| .MEG | Datafiler |
| .MET | Datafiler |
| .METS | Datafiler |
| .MEX | Datafiler |
| .MFL | Datafiler |
| .MFT | Datafiler |
| .MHP | Datafiler |
| .MIE | Datafiler |
| .MLB | Datafiler |
| .MMA | Datafiler |
| .MMAP | Datafiler |
| .MMC | Datafiler |
| .MML | Datafiler |
| .MMP | Datafiler |
| .MMW | Datafiler |
| .MNO | Datafiler |
| .MNY | Datafiler |
| .MOBI | Datafiler |
| .MOHO | Datafiler |
| .MOL | Datafiler |
| .MONEY | Datafiler |
| .MOX | Datafiler |
| .MPD | Datafiler |
| .MPI | Datafiler |
| .MPJ | Datafiler |
| .MPP | Datafiler |
| .MPR | Datafiler |
| .MPS | Datafiler |
| .MPT | Datafiler |
| .MPX | Datafiler |
| .MPZ | Datafiler |
| .MQ4 | Datafiler |
| .MQY | Datafiler |
| .MRCX | Datafiler |
| .MS8 | Datafiler |
| .MSEED | Datafiler |
| .MSEQ | Datafiler |
| .MSIF | Datafiler |
| .MSTY | Datafiler |
| .MTH | Datafiler |
| .MTT | Datafiler |
| .MTW | Datafiler |
| .MUF | Datafiler |
| .MUP | Datafiler |
| .MUSICXML | Datafiler |
| .MW | Datafiler |
| .MWC | Datafiler |
| .MWF | Datafiler |
| .MX | Datafiler |
