Democracy is "a system of government in which all the people of a state or polity ... are involved in making decisions about its affairs, typically by voting to elect representatives to a parliament or similar assembly."[1] Democracy is further defined as (a:) "government by the people; especially : rule of the majority (b:) " a government in which the supreme power is vested in the people and exercised by them directly or indirectly through a system of representation usually involving periodically held free elections."[2] According to American political scientist Larry Diamond, it consists of four key elements: "1. A political system for choosing and replacing the government through free and fair elections. 2. The active participation of the people, as citizens, in politics and civic life. 3. Protection of the human rights of all citizens. 4. A rule of law, in which the laws and procedures apply equally to all citizens".[3]

Communism (from Latin communis – common, universal)[1][2] is a socioeconomic system structured upon the common ownership of the means of production and characterized by the absence of social classes, money,[3][4] and the state; as well as a social, political and economic ideology and movement that aims to establish this social order. Communism includes a variety of schools of thought, which broadly include Marxism, anarchism (anarchist communism) and the political ideologies grouped around both. All these hold in common the analysis that the current order of society stems from its economic system, capitalism, that in this system, there are two major social classes: the proletariat – who must work to survive, and who make up a majority of society – and the capitalist class – a minority who derive profit from employing the proletariat, through private ownership of the means of production, and that political, social and economic conflict between these two classes will trigger a fundamental change in the economic system, and by extension a wide-ranging transformation of society. The primary element which will enable this transformation, according to communism, is the social ownership of the means of production.

n airport is an aerodrome with facilities for commercial aviation flights to take off and land.[1][2] Airports often have facilities to store and maintain aircraft, and a control tower. An airport consists of a landing area, which comprises an aerially accessible open space including at least one operationally active surface such as a runway for a plane to take off[3] or a helipad,[4] and often includes adjacent utility buildings such as control towers, hangars [5] and terminals. Larger airports may have fixed base operator services, airport aprons, air traffic control centres, passenger facilities such as restaurants and lounges, and emergency services. An airport with a helipad for rotorcraft but no runway is called a heliport. An airport for use by seaplanes and amphibious aircraft is called a Seaplane base. Such a base typically includes a stretch of open water for takeoffs and landings, and seaplane docks for tying-up.

Music is an art form whose medium is sound. Its common elements are pitch (which governs melody and harmony), rhythm (and its associated concepts tempo, meter, and articulation), dynamics, and the sonic qualities of timbre and texture. The word derives from Greek ??????? (mousike; "art of the Muses").[1] In its most general form the activities describing music as an art form include the production of works of music, the criticism of music, the study of the history of music, and the aesthetic dissemination of music. The creation, performance, significance, and even the definition of music vary according to culture and social context. Music ranges from strictly organized compositions (and their recreation in performance), through improvisational music to aleatoric forms. Music can be divided into genres and subgenres, although the dividing lines and relationships between music genres are often subtle, sometimes open to personal interpretation, and occasionally controversial. Within the arts, music may be classified as a performing art, a fine art, and auditory art. It may also be divided among art music and folk music. There is also a strong connection between music and mathematics.[2] Music may be played and heard live, may be part of a dramatic work or film, or may be recorded.

In 1937, the American sociologist Read Bain wrote that "technology includes all tools, machines, utensils, weapons, instruments, housing, clothing, communicating and transporting devices and the skills by which we produce and use them."[5] Bain's definition remains common among scholars today, especially social scientists. But equally prominent is the definition of technology as applied science, especially among scientists and engineers, although most social scientists who study technology reject this definition.[6] More recently, scholars have borrowed from European philosophers of "technique" to extend the meaning of technology to various forms of instrumental reason, as in Foucault's work on technologies of the self (techniques de soi). Dictionaries and scholars have offered a variety of definitions. The Merriam-Webster Dictionary offers a definition of the term: "the practical application of knowledge especially in a particular area" and "a capability given by the practical application of knowledge".[7] Ursula Franklin, in her 1989 "Real World of Technology" lecture, gave another definition of the concept; it is "practice, the way we do things around here".[8] The term is often used to imply a specific field of technology, or to refer to high technology or just consumer electronics, rather than technology as a whole.[9] Bernard Stiegler, in Technics and Time, 1, defines technology in two ways: as "the pursuit of life by means other than life", and as "organized inorganic matter."[10]