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**Production** may be:
Film
In **Economics**:

In **Ecology**:

In **Entertainment**:

In **Abstract systems**:

This page contains text from Wikipedia, the Free Encyclopedia -
https://wn.com/Production

A **production** or **production rule** in computer science is a *rewrite rule* specifying a symbol substitution that can be recursively performed to generate new symbol sequences. A finite set of productions is the main component in the specification of a formal grammar (specifically a generative grammar). The other components are a finite set of nonterminal symbols, a finite set (known as an alphabet) of terminal symbols that is disjoint from and a distinguished symbol that is the start symbol.

In an unrestricted grammar, a production is of the form where and are arbitrary strings of terminals and nonterminals however may not be the empty string. If is the empty string, this is denoted by the symbol , or (rather than leave the right-hand side blank). So productions are of the form:

where is the Kleene star operator, and denotes set union.

The other types of formal grammar in the Chomsky hierarchy impose additional restrictions on what constitutes a production. Notably in a context-free grammar, the left-hand side of a production must be a single nonterminal symbol. So productions are of the form:

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https://wn.com/Production_(computer_science)

A **record producer** (or music producer) has a very broad role in overseeing and managing the recording (i.e. "production") of a band or performer's music. A producer has many roles that may include, but are not limited to, gathering ideas for the project, selecting songs and/or session musicians, proposing changes to the song arrangements, coaching the artist and musicians in the studio, controlling the recording sessions, and supervising the entire process through audio mixing (recorded music) and, in some cases, to the audio mastering stage. Producers also often take on a wider entrepreneurial role, with responsibility for the budget, schedules, contracts, and negotiations.

In the 2010s, the recording industry has two kinds of producers with different roles: **executive producer** and **music producer**. Executive producers oversee project finances while music producers oversee the creation of music.

A music producer can, in some cases, be compared to a film director, with noted practitioner Phil Ek describing his role as "the person who creatively guides or directs the process of making a record, like a director would a movie. The audio engineering [person] would be more the cameraman of the movie." Indeed, in Bollywood music, the designation actually is *music director.* The music producer's job is to create, shape, and mold a piece of music. The scope of responsibility may be one or two songs or an artist's entire album – in which case the producer will typically develop an overall vision for the album and how the various songs may interrelate.

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**Field** may refer to:

This page contains text from Wikipedia, the Free Encyclopedia -
https://wn.com/Field

In computer science, data that has several parts, known as a *record,* can be divided into **fields**. Relational databases arrange data as sets of database records, also called rows. Each record consists of several *fields*; the fields of all records form the columns.

In object-oriented programming, *field* (also called *data member* or *member variable*) is the data encapsulated within a class or object. In the case of a regular field (also called *instance variable*), for each instance of the object there is an instance variable: for example, an `Employee`

class has a `Name`

field and there is one distinct name per employee. A static field (also called *class variable*) is one variable, which is shared by all instances.

Fields that contain a fixed number of bits are known as fixed length fields. A four byte field for example may contain a 31 bit binary integer plus a sign bit (32 bits in all). A 30 byte name field may contain a persons name typically padded with blanks at the end. The disadvantage of using fixed length fields is that some part of the field may be wasted but space is still required for the maximum length case. Also, where fields are omitted, padding for the missing fields is still required to maintain fixed start positions within a record for instance.

This page contains text from Wikipedia, the Free Encyclopedia -
https://wn.com/Field_(computer_science)

In mathematics, a **field** is one of the fundamental algebraic structures used in abstract algebra. It is a nonzero commutative division ring, or equivalently a ring whose nonzero elements form an abelian group under multiplication. As such it is an algebraic structure with notions of addition, subtraction, multiplication, and division satisfying the appropriate abelian group equations and distributive law. The most commonly used fields are the field of real numbers, the field of complex numbers, and the field of rational numbers, but there are also finite fields, algebraic function fields, algebraic number fields, *p*-adic fields, and so forth.

Any field may be used as the scalars for a vector space, which is the standard general context for linear algebra. The theory of field extensions (including Galois theory) involves the roots of polynomials with coefficients in a field; among other results, this theory leads to impossibility proofs for the classical problems of angle trisection and squaring the circle with a compass and straightedge, as well as a proof of the Abel–Ruffini theorem on the algebraic insolubility of quintic equations. In modern mathematics, the theory of fields (or **field theory**) plays an essential role in number theory and algebraic geometry.

This page contains text from Wikipedia, the Free Encyclopedia -
https://wn.com/Field_(mathematics)

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