aircraft circular letter
31United States Department of Homeland Security — DHS redirects here. For other uses, see DHS (disambiguation). United States Department of Homeland Security Agency overview Formed …
32Japan Airlines — Not to be confused with Air Japan, the charter carrier. Japan Airlines 日本航空 (Nihon Kōkū) IATA JL ICAO …
33History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… …
34List of heraldic charges — This article does not cover those charges which derive their shape in part from that of the field; see Ordinary (heraldry). Subordinary chargesA few simple charges are traditionally, and arbitrarily, classified among the subordinaries. (All other …
35Sound — /sownd/, n. The, a strait between SW Sweden and Zealand, connecting the Kattegat and the Baltic. 87 mi. (140 km) long; 3 30 mi. (5 48 km) wide. Swedish and Danish, Oresund. * * * I Mechanical disturbance that propagates as a longitudinal wave… …
36BMW — Infobox Company company name = Bayerische Motoren Werke AG company company type = Aktiengesellschaft (FWB|BMW) foundation = 1913 location city = flagicon|Germany Munich location country = Germany key people = Norbert Reithofer (CEO and Chairman… …
37Lightning — This article is about the atmospheric electrical phenomenon. For other uses, see Lightning (disambiguation). See also: Lightning strike Lightning striking Atlanta, United States Lightning is an atmospheric electrostatic discharge (spar …
38Iran and weapons of mass destruction — This article is about Iran and weapons of mass destruction. For Iran s nuclear power program, see Nuclear program of Iran. Weapons of mass destruction …
39Airspace class (United States) — This article describes the implementation of International Civil Aviation Organization airspace classes in the United States of America. For a general discussion of airspace classes, see Airspace class. The United States implementation of… …
40Government procurement in the United States — is based on many of the same principles as commercial contracting, but is subject to special laws and regulation as described below. Persons entering into commercial contracts are pretty much free to do anything that they can agree on. Each… …
