In computing, a Personal Storage Table (.pst) is an open proprietary file format used to store copies of messages, calendar events, and other items within Microsoft software such as Microsoft Exchange Client, Windows Messaging, and Microsoft Outlook. The open format is controlled by Microsoft who provide free specifications and free irrevocable technology licensing.
The file format may also be known as a Personal Folders (File). When functioning in its capacity as a cache for Outlook's Cached Exchange Mode feature, it may be called an Off-line Storage Table (.ost) or an Off-line Folders (File).
In Microsoft Exchange Server, the messages, the calendar, and other data items are delivered to and stored on the server. Microsoft Outlook stores these items in a personal-storage-table (.pst) or off-line-storage-table (.ost) files that are located on the local computer. Most commonly, the .pst files are used to store archived items and the .ost files to maintain off-line availability of the items. This is an essential feature of Microsoft Outlook.
OST may refer to:
Ost is a surname. Notable people with the surname include:
Beneath the light of a slaughter-sun
In grim inexorable might we come
To cleanse the earth again
Wearing the iron crown of genocide.
And when we come to claim you
Wearing the iron crown of genocide
Deathshead legion
Slaughter of innocence...
Washed away...
Wahed away,
Into the ovens once again
And now you see all that you have dear
All that gave you joy in your life
Rendered obsolete
As our new day dawns
This time