Detailed information for file extension OST :
Primary association: Exchange
Company: Microsoft Corporation
Identifying characters Hex: 21 42 44 4E , ASCII: !BDN
Program ID: OSTFile , WEBFile
Reference: OST on Wikipedia , view more extensions
File type OST's association with other applications are:
- On-Screen Takeoff (Project) by On Center Software, Inc.
On-Screen Takeoff is software used in creating takeoffs from digital and paper plans.
- Outlook (Offline Storage File) by Microsoft Corporation
The .PST file has a 2GB file size limit. When approaching the 2GB limit, if Office SP-1 is not installed, Outlook becomes extremely unstable to the point of not being able to clicking on any message, folder, etc. without locking Outlook. This includes attempting to access an .OST file. To shrink the file, delete items from their folders and then clear the Deleted Items folder using Tools | Empty Deleted Items Folder. Outlook will compress the folder in the background while the computer is idle so you may not see a size decrease immediately. The identifying characters used for this association are - Hex: 21 42 44 4E , ASCII: !BDNProgram ID: OSTFile , WEBFile Related links: MS Knowledge Base Article
- Tivoli Storage Manager (File) by IBM
The IBM Tivoli Storage Manager family of offerings is designed to provide centralized, automated data protection that can help reduce the risks associated with data loss.