operating system, programming
The mechanism used by an application program to request service from the operating system. System calls often use a special machine code instruction which causes the processor to change mode (e.g. to “supervisor mode” or “protected mode”). This allows the OS to perform restricted actions such as accessing hardware devices or the memory management unit.
- System building
noun 1. a method of building in which prefabricated components are used to speed the construction of buildings
1. tables. 2. (in prescriptions) tablet. abbreviation 1. table (list or chart) tab. table
noun 1. any of numerous bloodsucking flies of the family Tabanidae, comprising the deer flies and horse flies. adjective 2. belonging or pertaining to the family Tabanidae. noun 1. any stout-bodied fly of the dipterous family Tabanidae, the females of which have mouthparts specialized for sucking blood: includes the horseflies tabanid ta·ba·nid (tə-bā’nĭd, -bān’ĭd) n. […]
noun 1. a durable silk or acetate fabric having alternating stripes of satin and moiré, for drapery and upholstery. 2. tambour (def 3). noun 1. a hard-wearing fabric of silk or similar cloth with stripes of satin or moire, used esp for upholstery