OSD may refer to any of the following:
1. Short for On-Screen Display, OSD is a menu displayed on various devices that display options used to adjust the display or other options that may be available to that device. The picture is an example of an OSD being displayed in the bottom right corner of a computer monitor.
2. Short for Open Source Definition, OSD is an agreement for distributing, using, and modifying open source code.
3. Abbreviation for Object-based Storage Device, an OSD is any device that utilizes the standard of storing data sets as objects. The SCSI command set for OSDs was created by the Storage Industry Networking Association.