MIL-HDBK-1908B
Joystick uci/gen. A stick type input device used to provide continuous control movement. In computer applications, joysticks are typically used to provide two axis cursor control on a display screen. Joysticks may be displacement- or force-operated. A displacement (or isotonic) joystick
moves in the direction it is pushed. Displacement joysticks are usually spring-loaded so that they return to their center position. A force-operated (or isometric) joystick has no perceptible movement; its
output is a function of the force applied.
Justification uci. Alignment of text or numbers with a margin. Left-justified text is aligned at the left margin; the right margin is left ragged. Right-justified text is aligned at the right margin; the left margin is left ragged. Fully-justified text has spacing added between letters and words so that all lines are the same length, resulting in the alignment of both margins.
Keyboard uci. An input device used to enter data by manual depression of keys which causes the generation of the selected code element. That area of the device in which keys associated with characters are arranged
Keyboard arrangement uci. The positioning of keys with relation to each other and their association with specific characters.
Keytop uci. A finger contact member which allows effective operation of the device, also called a key.
Label uci. A title or descriptor that helps a user identify displayed data. (See "data field label.")
Lesson learned acq. A proven experience of value in the conduct of future programs. It is normally a conclusion drawn from evaluation of feedback information or from analysis of the performance resulting from technical and management functional activities. A lesson learned is usually recorded and eventually incorporated, where applicable, in regulations, technical manuals, specifications, standards, or handbooks.
Life support acq. That area of human factors which applies scientific knowledge to items which require special attention or provisions for health promotion, biomedical aspects of safety, protection, sustenance, escape, survival, and recovery of personnel.
Light-emitting diode (LED) gen. A pn-junction semiconductor device that emits incoherent
optical radiation when biased in the forward direction. Primarily used in place of incandescent lamps as indicators and in alphanumeric assemblies.
Line replaceable unit (LRU) acq. A component, assembly, or subassembly which is normally removed and replaced as a single unit to correct a deficiency or malfunction. LRUs may be composed of shop replaceable units (SRUs) which are generally removed and replaced in a maintenance shop.
Liquid crystal display (LCD) gen. A segmented, solid state, passive display device consisting of a liquid crystal material, composed of specialized molecules, sandwiched between two conductive plates, at least one of which is transparent. Transmission of light through the medium containing the crystals is affected by the orientation of the crystals. When a current is applied, the orientation of the crystals, and therefore the transmission characteristics of the medium, are altered, resulting in contrast between particular segments/pixels and their background.
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