Closed Circulatory System: A system that uses a continuous series of vessels of different sizes to deliver blood to body cells and return it to the heart; found in echinoderms and vertebrates.

 

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Closed Circulatory System: A system that uses a continuous series of vessels of different sizes to deliver blood to body cells and return it to the heart; found in echinoderms and vertebrates.

Nervous System: One of eleven major body organ systems in animals; coordinates and controls actions of internal organs and body systems, receives and processes sensory information from the external environm . . . View Full Definition

Network Basic Input - Output System (NetBIOS): A commonly used networking protocol originally developed for LANs. Operates on the Session and Transport layers of the OSI model, so doesn't make use of physical network characteristics.

Next Generation Water Level Measurement System (NGWLMS): A fully integrated system encompassing new technology sensors and recording equipment, multiple data transmission options, and an integrated data processing, analysis, and dissemination subsystem.

North American Industry Classification System (NAICS): Standard industrial classification codes have been replaced in the 1997 Census of Agriculture by the new North American Industry Classification System (NAICS). NAICS is a unique, all-new sys . . . View Full Definition

Nonsystematic Risk: Nonsystematic risk results from unpredictable factors, such as poor management decisions, successful competitive products, or suddenly obsolete technologies that may affect the securities is . . . View Full Definition

National Wildlife Refuge System (NWRS): Consists of all of the National Wildlife Refuges, the Waterfowl Production Areas, and certain other small tracts managed by states under cooperative agreements with the Fish and Wildlife Ser . . . View Full Definition

National Television System Committee (NTSC): Refers to the standards used for video broadcast and playback signal parameters in the U.S. Japan and other countries. Alternative systems used in Europe and some Asian countries are PAL and SECAM.

National Association Of Securities Dealers Automatic Quotation System (Nasdaq): An electronic quotation system that provides price quotations to market participants about the more actively traded common stock issues in the OTC market. About 4000 common stock issues are . . . View Full Definition

National Association Of Securities Dealers Automated Quotation System (NASDAQ): NASDAQ is a computerized stock trading network that allows brokers to access price quotations for stocks being traded electronically or sold on the floor of a stock exchange.