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capillary

(Encyclopedia) capillarycapillarykăpˈəlĕrˌē [key], microscopic blood vessel, smallest unit of the circulatory system. Capillaries form a network of tiny tubes throughout the body, connecting…

Universal Postal Union

(Encyclopedia) Universal Postal Union (UPU), specialized agency of the United Nations since 1948, with headquarters at Bern, Switzerland. Established in 1875 following adoption of the Universal…

videotex

(Encyclopedia) videotex, communications service that is linked to an adapted television receiver or a personal computer by telephone lines, cable television facilities, or the like, and that allows a…

blood clotting

(Encyclopedia) blood clotting, process by which the blood coagulates to form solid masses, or clots. In minor injuries, small oval bodies called platelets, or thrombocytes, tend to collect and form…

virtual reality

(Encyclopedia) virtual reality (VR) or virtual environment (VE), computer-generated environment with and within which people can interact. The advantage of VR is that it can immerse people in an…

modem

(Encyclopedia) modem [modulator/demodulator], an external device or internal electronic circuitry used to transmit and receive digital data over a communications line normally used for analog signals…

Internet, the

(Encyclopedia) Internet, the, international computer network linking together thousands of individual networks at military and government agencies, educational institutions, nonprofit organizations,…

Roberts, Lawrence Gilman

(Encyclopedia) Roberts, Lawrence Gilman, 1937–2018, American computer scientist, b. Westport, Conn., Ph.D. Massachusetts Institute of Technology, 1963. He worked at MIT's Lincoln Laboratory, a…

Jinan

(Encyclopedia) JinanJinanjē-nän [key] or TsinanTsinantsĭnˈänˈ [key], city (1994 est. pop. 1,659,900), capital of Shandong prov., E China. It lies 3 mi (4.8 km) S of the Huang He (Yellow River) and is…