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The Group derived from the concept Word Italian gruppo and refers to the plurality of beings or things forming a whole, regarded as physically or mentally. The term is used in many fields, such as mathematics, astronomy, chemistry, sociology, computer science and music.
On math, a group is a structure formed by a set on the elements which set a binary operation or an act of composition internal that respects certain algebraic conditions.
In astronomy, a group is a small number of galaxies that lie near each other (for example, the Local Group, where the Milky Way).
In the field of chemistry, the word group includes two uses. Firstly, it can refer to a column of the periodic table of the elements. On the other hand, it is a functional entity consisting of certain atoms whose presence provides a certain property to the molecule (functional group).
Furthermore, a social group is a subset of cultures or societies. The use of the term is quite common in sociology.
For Internet users, a group is a type of website where there are forums and where members can exchange/share information.
Finally, it is worth mentioning that a musical group is a set of people who interpret (singing or playing instruments) of musical works. There are groups of any kind of musical style, such as rock, pop, jazz or blues, to name a few. The Rolling Stones and The Beatles are musical groups.