| iqf | Integra 3.0 Query Data |
| iqj | CADIQ Tasks Details Data |
| iql | CADIQ Log |
| iqm | Inter-Quake Model |
| iqr | CADIQ View Analysis Results Data |
| iqs | CADIQ Summary Log |
| iqt | Tektronics RSA306 TIQ Data |
| iqt | Tektronix RSA3408A RAW IQ Data |
| iqu | AmeriCalc Update Data |
| iqx | Nexjen IQX Data |
| iraf | IRAF Data |
| irafhosts | IRAF Hosts Data |
| irc | jIRCii Script |
| ird | 3K3Y IRD File |
| ird | Microsoft Money Temporary Data |
| irf | RoomBox6 IR Codes Data |
| irf | WinPLOTR IRF Data |
| irl | AMX IR File |
| irl | HomeVision Infrared Signal Data |
| irn | IRedit Database |
| irock | intelliRock Sensor Data |
| irp | Microsoft ISA Server Report Generator Data |
| irr | AquaCrop Irrigation Data |
| irr | UVBrewer Irradiance File |
| irr8 | Avantes Avasoft v8 Absolute Irradiance Mode Data |
| irs | Corel WordPerfect IRS Resource Data |
| irs | LabControl Spectacle Binary Data |
| irt | Graphicon Interactive RealTime PHIGS |
| irt | IRIT 3D Model |
| irtp | Graphicon Interactive RealTime PHIGS |
| irx | Brewer Lamp Irradiance File |
| irx | UVBrewer Irradiance File |
| is1 | Komori PCC Intermediate Ink Profile |
| is1 | M3 Sakura Real-Time Save 1 Data |
| is1 | SmartWare Input-Screen File |
