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Below is a list of all the Asian countries and territories, in order of geographical area. The land boundary between Asia and Europe is a historical and cultural construct that has been defined variously; only as a matter of agreement is it tied to a specific borderline. Thus, the isthmus between the Black and Caspian seas, which culminates in the Caucasus mountain range to the south, is part of Asia. The Second Industrial Revolution took place in Europe and the United States between the late nineteenth and early twentieth centuries. Sindhi and Balochi are prominent languages in Sindh and Balochistan accordingly. Similar to Afghanistan, Bhutan is also a landlocked country in South Asia, situated at the eastern end of the Himalayas. It is bordered to the north by China and to the south, east and west by India. The national language of Bhutan is Bhutanese , one of the 53 languages in the Tibetan language family. In 1999, Temasa, the subsidiary of Telefonica, was sold to Tyco and CW-M

Electronic noise is defined as unwanted disturbances superposed on a useful signal that tend to obscure its information content. Noise may be electromagnetically or thermally generated, which can be decreased by lowering the operating temperature of the circuit. Other types of noise, such as shot noise cannot be removed as they are due to limitations in physical properties. Computers, electronic clocks, and programmable logic controllers are constructed of digital circuits. These days analog circuitry may use digital or even microprocessor techniques to improve performance. The study of semiconductor devices and related technology is considered a branch of solid-state electronics. Current Status To most engineers, the terms "digital circuit", "digital system" and "logic" are interchangeable in the context of digital circuits. Most digital circuits use a binary system with two voltage levels labeled "0" and "1". Often logic "0&