- hardware branch
- The hardware archive root key in the registry that is a superset of the
memory-resident hardware tree. Although the hardware tree contains information
only about those devices currently detected and running in the system, the
registry contains a complete list of all hardware ever installed on the
particular computer. The hardware root key is \\Hkey_Local_Machine\Hardware.
- hardware tree
- A record in RAM of the current system configuration based on the
configuration information for all devices in the hardware branch of the
registry. The hardware tree is created each time the system is started or
whenever a dynamic change occurs to the system configuration.
- Host controller interface. System-level interface supporting USB.
- Hardware Compatibility List. See WHQL.
- Hardware Compatibility Tests. A suite of tests from WHQL to verify
hardware and device driver operations under a specific operating environment.
These tests exercise the combination of a device, a software driver, and an
operating system under controlled conditions to verify that all components
- Hard disk I/O controller.
- High-definition TV. A proposed standard that recommends doubling the
current 525 lines per picture to 1050 lines, and increasing the screen aspect
ratio (that is, width to height) from the current 12:9 to 16:9, which would
create a television screen shaped more like a movie screen.
- Human Interface Device.
- high resolution
- An adjective describing improvement in display image quality as a result
of increasing the number of pixels per square inch.
- Hue-saturation-brightness. With the HSB model, all colors can be defined
by expressing their levels of hue (the pigment), saturation (the amount of
pigment), and brightness (the amount of white included), in percentages.
- The color tint of an image. The color of the analog video signal is
determined by three factors: hue, saturation, and luminance.
Interface Device Specification
- The device class definition developed by the USB standards group for HIDs.
Serves as the basis for the WDM input device support, and unifies input
devices by providing flexible data reporting, typeless data, and arrayed and
variable input and output.
- Hertz (cycles per second).