File with an .ORG extension contains data such as personal data with entries from the events scheduled in the calendar, contact’s business cards, event scheduling programs or lists of tasks to be completed. ORG files are stored in different format versions depending on the software’s version.

Creating and utilising the ORG format software is Lotus Organizer, which support and sharing has been cancelled in the year 2013. Next software versions, after 1 and 1.1, and the format versions, were utilising extensions with corresponding numbers – .OR2, .OR3, .OR4, .OR5, .OR6.