lossless compression
Refers to data compression techniques in which no data is lost. The PKZIP compression technology is an example of lossless compression. For most types of data, lossless compression techniques can reduce the space needed by only about 50%. For greater compression, one must use a lossy compression technique. Note, however, that only certain types of data — graphics, audio, and video — can tolerate lossy compression. You must use a lossless compression technique when compressing data and programs.
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- lost cluster
Also called a lost allocation unit, or a lost file fragment. A data fragment that does not belong to any file, according to the system’s file management system, and, therefore, is not associated with a file name in the file allocation table. Lost clusters can result from files not being closed properly, from shutting down […]
- lossy compression
Refers to data compression techniques in which some amount of data is lost. Lossy compression technologies attempt to eliminate redundant or unnecessary information. Most video compression technologies, such as MPEG, use a lossy technique.
- loupe
Loupe is a utility that displays a magnified view of whatever is beneath the mouse cursor, much like a jeweler or printer loupe. A loupe can be found in products like Adobe Acrobat, or it is available as a stand-alone desktop utility. The term is derived from a loupe magnifying glass, which is usually found […]
- Low-Level Language
A machine language or an assembly language. Low-level languages are closer to the hardware than are high-level programming languages, which are closer to human languages.
- low memory
In DOS systems, the first 640K of memory. This portion of memory is reserved for applications, device drivers, and memory-resident programs (TSRs). Low memory is also called conventional memory.