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SD is an acronym for several computer terms, most commonly On-Screen Display, a menu for adjusting monitor settings like brightness and contrast. It can also refer to Open Software Description, a data format for software, or the Open Source Definition, which sets criteria for open-source software.

On-Screen Display (OSD)

What it is: A menu that appears on a display to adjust settings.

What it does: Allows users to adjust settings like brightness, contrast, color, and input source. On devices like cameras, it can be used to configure settings like resolution and frame rate.

Where it's found: Computer monitors, televisions, projectors, and cameras.

How it's used: You typically access the OSD with physical buttons on the device, a remote control, or a joystick, which navigates the on-screen menu to make changes in real-time.

Other meanings of OSD

Open Software Description: An XML-based vocabulary for describing software packages, which was designed to make software distribution and updates easier.

Open Source Definition: A document created by the Open Source Initiative that defines the criteria for a software license to be considered "open source".

Operating System Deployment: A feature of Microsoft's System Center Configuration Manager for deploying operating systems.