four-aspect signal
21Color Graphics Adapter — The 640×200 2 color mode with its default foreground color Arachne Internet suite. The Color Graphics Adapter (CGA), originally also called the Color/Graphics Adapter or IBM Color/Graphics Monitor Adapter,[1] introduced in 1981, was IBM s first… …
22ancient Greek civilization — ▪ historical region, Eurasia Introduction the period following Mycenaean civilization, which ended in about 1200 BC, to the death of Alexander the Great, in 323 BC. It was a period of political, philosophical, artistic, and scientific… …
23Northern Counties Committee — The Northern Counties Committee (NCC) was a railway that served the north east of Ireland. It was built to Irish gauge (1,600 mm (5 ft 3 in)) but later acquired a number of 914 mm (3 ft)  narrow gauge… …
24biblical literature — Introduction four bodies of written works: the Old Testament writings according to the Hebrew canon; intertestamental works, including the Old Testament Apocrypha; the New Testament writings; and the New Testament Apocrypha. The Old… …
25Australian railway signalling — Just as the railways of Australia has suffered issues from incompatible rail gauges, the different states have tended to go their own way regarding railway signalling practice.New South WalesThe signalling system in New South Wales consists… …
26German railway signalling — Railway signals in Germany are regulated by the Eisenbahn Signalordnung (ESO, railway signalling rules). There are several signalling systems in use: History Reichsbahn Originally every rail company had its own signalling system. After these… …
27nervous system, human — ▪ anatomy Introduction system that conducts stimuli from sensory receptors to the brain and spinal cord and that conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main… …
28France — /frans, frahns/; Fr. /frddahonns/, n. 1. Anatole /ann nann tawl /, (Jacques Anatole Thibault), 1844 1924, French novelist and essayist: Nobel prize 1921. 2. a republic in W Europe. 58,470,421; 212,736 sq. mi. (550,985 sq. km). Cap.: Paris. 3.… …
29railroad — /rayl rohd /, n. 1. a permanent road laid with rails, commonly in one or more pairs of continuous lines forming a track or tracks, on which locomotives and cars are run for the transportation of passengers, freight, and mail. 2. an entire system… …
30china — /chuy neuh/, n. 1. a translucent ceramic material, biscuit fired at a high temperature, its glaze fired at a low temperature. 2. any porcelain ware. 3. plates, cups, saucers, etc., collectively. 4. figurines made of porcelain or ceramic material …
