VAR Value added reseller or retailer. A company that resells hardware and software packages made by another company (such as an OEM) with extra components added (such as specialist software) to developers and/or end users.
VBI Vertical blanking interval. The time interval between television fields needed for the scanning gun to move from the bottom of the screen to the top for the start of the next field.
VCACHE In Windows, a 32-bit protected-mode cache driver.
VCOMM In Windows, a 32-bit protected-mode communications driver.
VCR Video cassette recorder. An analog magnetic recording and playback machine. Typically used for recording and viewing full-motion video. Also useful as a data backup device.
VGA Video graphics array. A video adapter that supports 640 × 480-pixel color resolution. A video display standard for boot devices under Windows operating systems.
VM Virtual machine. Software that mimics the performance of a hardware device.
VPE Video Port Extensions. Extensions to the DirectDraw API to control the video stream from the video port within the context of VGA memory.
VxD Virtual device driver. A device driver that runs at the privileged ring 0 protected mode of the microprocessor. Can extend the services of the Windows kernel, supervise hardware operations, or perform both functions. Such driver files are usually named according to the scheme VxD, where x refers to the device or service supported.