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El heavy metal es un género evolucionado a partir del Rock, está caracterizado por ritmos potentes logrados mediante la utilización de guitarras distorsionadas, baterías con doble pedal, y bajos pronunciados.[1]

El término heavy metal, debido a la progresión que ha sufrido este género desde su creación, se usa actualmente para hacer referencia a dos conceptos distintos: Heavy metal como género en general y heavy metal como estilo tradicional dentro de dicho género

A music genre is a category (or genre) of pieces of music that share a certain style or "basic musical language" (Peter van der Merwe 1989, p.3). Music may also be categorised by non-musical criteria such as geographical origin, though a single geographical category will normally include a wide variety of sub-genres. A music genre (or subgenre) could be defined by the techniques, the styles, the context and the themes (content, spirit).

Ecology (from Greek: οίκος, oikos, "household"; and λόγος, logos, "knowledge") is the scientific study of the distribution and abundance of living organisms and how the distribution and abundance are affected by interactions between the organisms and their environment. The environment of an organism includes both physical properties, which can be described as the sum of local abiotic factors such as insolation (sunlight), climate, and geology, and biotic factors, which are other organisms that share its habitat.

The word "ecology" is often used more loosely in such terms as social ecology and deep ecology and in common parlance as a synonym for the natural environment or environmentalism. Likewise "ecologic" or "ecological" is often taken in the sense of environmentally friendly.

The term ecology or oekologie was coined by the German biologist Ernst Haeckel in 1866, when he defined it as "the comprehensive science of the relationship of the organism to the environment". Haeckel did not elaborate on the concept, and the first significant textbook on the subject (together with the first university course) was written by the Danish botanist, Eugenius Warming. For this early work, Warming is often identified as the founder of ecology

Information technology (IT), as defined by the Information Technology Association of America (ITAA), is "the study, design, development, implementation, support or management of computer-based information systems, particularly software applications and computer hardware." IT deals with the use of electronic computers and computer software to convert, store, protect, process, transmit and retrieve information, securely.

Recently it has become popular[citation needed] to broaden the term to explicitly include the field of electronic communication so that people tend to use the abbreviation ICT (Information and Communications Technology).

Today, the term information technology has ballooned to encompass many aspects of computing and technology, and the term is more recognizable than ever before. The information technology umbrella can be quite large, covering many fields. IT professionals perform a variety of duties that range from installing applications to designing complex computer networks and information databases. A few of the duties that IT professionals perform may include data management, networking, engineering computer hardware, database and software design, as well as the management and administration of entire systems.

Linguistic typology is a subfield of linguistics that studies and classifies languages according to their structural features. Its aim is to describe and explain the structural diversity of the world's languages. It includes three subdisciplines: Qualitative typology deals with the issue of comparing languages and within-language variance, Quantitative typology deals with the distribution of structural patterns in the world’s languages, and Theoretical typology explains these distributions

Also known as processual symbolic analysis, the symbology concept was developed by Victor Turner in the mid-1970s to refer to the use of symbols within cultural contexts, in particular ritual. In anthropology, symbology originated as part of Victor Turner's concept of "comparative symbology". Turner (1920-1983) was professor of Anthropology at Cornell University, the University of Chicago, and finally he was Professor of Anthropology and Religion at the University of Virginia.[1] In 1940, Robert A. Heinlein used "symbology" in Blowups Happen, a mathematics-based short story. He uses the word as a way to establish conceptual connections between behavioral psychology and mathematics.

The contemporary use of the term first appeared on Usenet groups in the late 1980s . It is thought to be a truncation of the phrase trolling for suckers, itself derived from the sport fishing technique of trolling. The latter can be compared with trawling.

The word likely gained currency because of its apt second meaning, drawn from the trolls portrayed in Scandinavian folklore and children's tales; they are often ugly, obnoxious creatures bent on mischief and wickedness. The image of the troll under the bridge in the "Three Billy Goats Gruff" emphasizes the troll's negative reaction to outsiders intruding on its physical environment, particularly those who intend to graze in its domain without permission. The word occurs also in John Awdeley’s Fraternity of Vagabonds (1561) to characterize the first four of twenty-five types of disobedient male servants or "knaves." The first entrant in Awdeley's list is particularly illustrative:

Troll and Troll by is he that setteth naught by no man, nor no man by him. This is he that would bear rule in a place and hath no authority nor thanks, and at last is thrust out of the door like a knave.[2]

It seems a singularly apt description, though no provenance has ever been demonstrated to connect it with the modern usage.

"Troll" was used in Santa Cruz, California, to designate homeless people by anti-homeless individuals, and a T shirt was worn, with the picture of a homeless person, a "not" line drawn through it, and the words "no trolls".

The Armenian SSR (Armenian: Հայկական Սովետական Սոցիալիստական Հանրապետություն, Haykakan Sovetakan Sotsialistakan Hanrapetutyun; Russian: Армянская Советская Социалистическая Республика) or the Soviet Socialist Republic of Armenia was one of fifteen constituent republics of the Soviet Union. It came into being when the Communist Party of Armenia proclaimed control of Armenia on November 29, 1920. On December 1, 1920, Prime Minister Simon Vratsian ceded control of the country. It later changed its name to the Armenian Soviet Socialist Republic. The period is sometimes known as the Second Republic of Armenia, which followed the short lived Democratic Republic of Armenia (also known as the First Republic of Armenia).

Prior to the October Revolution in 1917, Armenia was part of the then Russian Empire and confined to the borders of the Erivan Governorate. Bolshevik leader Vladimir Lenin's government announced that minorities in the empire could pursue a course of self-determination. Following the collapse of the empire, Armenia, Azerbaijan and Georgia, declared themselves independent from Russian rule and each established their respective republics. After suffering numerous casualties under Ottoman rule during the Armenian Genocide and the subsequent Turkish-Armenian War, the historic Armenian area in the Ottoman Empire was overrun with despair and devastation. When the Democratic Republic of Armenia was invaded by the Bolsheviks in 1920, it was declared a Soviet republic.

On August 23, 1990, it was renamed into Republic of Armenia, but remained in the Soviet Union until its official proclamation of independence in 1991.

Զինանշանի կենտրոնական մասում` վահանի վրա, պատկերված են հայկական չորս թագավորական տոհմերի` Արտաշեսյանների, Արշակունիների, Բագրատունիների և Ռուբինյանների (Կիլիկյան թագավորություն) զինանշանները : Դրանք բոլորում են բիբլիական Արարատ լեռան պատկերը, որի գագաթին ուրվագծված է Նոյյան տապանը : Լեռան ստորոտում Վանա լիճն է :
Վահանի երկու կողմից պատկերված են առյուծ և արծիվ, որոնք խորհրդանշում են ոգու, իշխանության, աննկունության և արիության ուժը : Ներքևում պատկերված սուրը խորհրդանշում է հայ ժողովրդի պայքարը հանուն ազատության և անկախության, փետուրն ու հասկերը` նրա ստեղծարար տաղանդը և խաղաղասիրությունը :

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