| ias | Intermodulation Analysis System Data |
| iati | International Aid Transparency Initiative Data |
| iavatar | iClone Avatar |
| iaw | ImageAMMO Wrapper |
| ib | Embarcadero InterBase Database |
| iba | MDE InfoHandler Infobase |
| ibadr | IsoBuster Address Data |
| ibak | Password Safe Intermediate Backup Archive |
| ibank | iBank Accounting Data |
| ibc | Incredibar Toolbar Content |
| ibc | Microsoft Outlook InterConnect Bizcard Data |
| ibc | PLINK GCTA Inbreeding Coefficient Report Data |
| ibd | Microsoft Windows Installer Exported Database |
| ibd | MySQL InnoDB Tablespace |
| ibd | Symantec Patch Management Solution v7 Data |
| ibe | IBECrypto Encrypted File |
| ibg | iBridge Project Workspace Data |
| ibg | ImgBurn Graph Data |
| ibk | IncrediMail Account Backup Data |
| ibk | Treepad Database Index Backup |
| ibl | PCLTool Index Location Data |
| ibl | PTC Creo Blend Feature Data |
| ibl | sIBL System Data |
| ibn | WinIQSIM Data |
| ibo | IB Objects Data |
| ibp | CLIC RAW Data |
| ibr | IsoBuster Saved Search Data |
| ibs | IBIS Data |
| ibs | IBM i2 iBase Data |
| ibs | Incredibar Toolbar Skin Data |
| ibt | IGOR Pro Binary Misc File |
| ibu | MariaDB InnoDB Undo Log |
| ibv | IGOR Pro Binary Variable File |
| ibw | IGOR Pro Binary Wave File |
| ibx | Interscope BlackBox File |
