U
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
- UART
- UNC
-
Universal naming convention.
- unicast
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A method used by media servers to provide content to connected clients. In unicast, each client receives a discrete stream, and no other client has access to that stream.
- Unicode
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A standard, fixed-width, 16-bit character encoding scheme that the system uses to provide NLS support for locale-specific natural languages.
See also NLS.
- Unidrv
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Abbreviation for the Microsoft Universal Printer Driver.
- Unidrv font metrics (UFM)
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A set of metrics that describe a particular Unidrv font.
- Unimodem
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Universal modem driver. A driver-level component that uses modem description files to control its interaction with the communications driver, VCOMM.
- uninterruptible power supply (UPS)
-
A device connected between a computer and a power source that ensures that electrical flow to the computer is not interrupted because of a blackout and, in most cases, protects the computer against potentially damaging events such as power surges and brownouts.
- universal asynchronous receiver-transmitter (UART)
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A module composed of a single integrated circuit, which contains both the receiving and transmitting circuits required for asynchronous serial communication.
- universal serial bus (USB)
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An extension dynamic configurable bus for standard computer architectures as defined in the Universal Serial Bus Specification, published by the USB Implementers Forum.
- upper memory block (UMB)
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An upper memory block is a contiguous block of memory starting at an address above 640 KB. MS-DOS distinguishes between conventional memory (addresses between 0 and 640 KB) and upper memory (addresses above 640 KB).
- UPS
- USB
- USB class
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The class of filters under WDM that provides a bus interface and bus enumerator for USB.
- USB communication interface
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A communication interface is a USB interface that conforms to the Communications Class definition. Such an interface identifies itself as using the Communication Class.
- USB data interface
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A data interface is a USB interface that conforms to the Data Class definition. Such an interface identifies itself as using the Data Class.
- USB management element
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A management element is a type of USB pipe that manages the communication device and its interfaces. Currently, only the default pipe is used for this purpose.
- USB master interface
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A Communication Class interface that is designated to be the master interface of zero or more interfaces. The interfaces that the master interface controls create a complete function in a USB communication device. The master interface accepts management requests for the union.
See also USB union.
- USB notification element
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A type of USB pipe. Although a notification element is not required to be an interrupt pipe, a notification element is typically defined in this way.
- USB union
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The relationship that exists between one or more interfaces that combine to form a functional unit.
- user mode
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The nonprivileged processor mode in which application code, including protected subsystem code, executes. User-mode applications cannot gain access to system data except by calling subsystem-supplied functions, which, in turn, call system services.
See also kernel mode.
- user space
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A block of virtual memory, dedicated to the use of the current user-mode process. Generally, user space is a range of low-order virtual addresses around two gigabytes in size.
See also hyperspace, kernel space, section object, and view.
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Build date: 11/6/2012
