What is a file extension?Short answer: it's the set of letters after the period (.) in the name of a file. Long answer: File extensions signify the file format of a file. It tells the operating system (OS) how data was stored in the file. Not all OS, require a file extension though. For instance, this is optional in Unix, but is mandatory with MS-DOS and Windows systems. In most file formats the file type is actually defined by the contents (first bytes, file structure), but extensions are used to define the application that is used for opening the file. Below is a detailed database of thousands of file extensions our team has compiled for you. Feel free to browse! |
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| OR4 - Extension Details | |||||
| Date Added: | December 02, 2009 | ||||
| File Extension: | .OR4 | ||||
| Description 1: | .OR4 is a file extension that has to do with Lotus Organizer 4 File. A .OR4 file refers to an organizer file that contains certain info. The information includes a todo list, an address book and a calendar, along with other notes. Lotus Organizer 4 is behind the .OR4 file formats creation. | ||||
| File Type: | Data file | ||||
| Mode: | ASCII | ||||
| Program(s) to Open: | Windows: IBM Lotus Organizer 4 or later (part of Lotus SmartSuite) | ||||
| Common: | |||||
| Extension: | |||||
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