What is "first class"

a. 1 Belonging to the best or top group in a system of classification. 2 Of, or relating to the most luxurious and expensive class of accommodation on a train, ship, hotel, etc. 3 Of, or relating to a class of mail to be delivered before second class. 4 (context cricket English) Of, or relating to a first class match. 5 (context programming English) Of, or relating to a treatment like that for a first-class citizen. n. A rank in the http://en.wikipedia.org/wiki/Boy%20Scouts%20of%20America, above tenderfoot and second class, that traditionally has required proficiency in scoutcraft skills.

1. n. the highest rank in a classification

2. mail that includes letters and postcards and packages sealed against inspection [syn: 1st class, first-class mail, 1st-class mail, priority mail]

3. the most expensive accommodations on a ship or train or plane

In database modeling, a first class item is one that has an identity independent of any other item. The identity allows the item to persist when its attributes change, and allows other items to claim relationships with the item.

As a general rule, first class items represent things rather than relationships. For example, the database representations of a human and of a company are each first class items. However, the fact that the person is an employee of that company is not a first class item. Likewise, data about that relationship, e.g. information about the salary the company pays to its employee, is not a first class item.

Typically, a relational database will include several tables, each of which contains rows representing first class items of a given type (e.g. a table of people, a table of companies). It will also contain other tables representing relationships between these first class items.

In a table representing first class items, one column of the table will typically contain a different integer assigned to each row (effectively, to each item) as a unique identifier: that is to say, unique for objects of this type; objects of different types, represented in different tables, can coincidentally have the same identifier, but the coincidence is meaningless.

In a relational database, a table representing a relationship between two or more first class items (or data about that relationship) will usually not have special identifiers for its rows. Instead these rows will be identified by an ordered tuple consisting of unique identifiers of the first class items involved in the relationship.

First class (or 1st class, Firstclass) generally implies a high level of service, importance or quality. Specific uses of the term include:

First Class was a 1980s BBC TV game show hosted by Debbie Greenwood. The show was broadcast on Friday evenings on BBC 1 and ran for at least three series. Two teams of three students (each team representing a particular school) would take part in a multi-format quiz featuring questions on both general knowledge and popular culture, as well as innovative video game rounds. Rounds such as the "Spinning Gold Disc" made use of a simulated computer display similar to other game shows of the same era, such as Blockbusters and Catchphrase. Other rounds such as "Word of Mouth" used a real computer display from a BBC Micro. This computer also provided the on-screen captions and scores and was nicknamed Eugene, after the show's original programmer Eugene Crozier.

The competition was a knockout tournament; the eventual winners of the series would be presented with a computer (usually a BBC Master) for their school. Celebrity episodes of the show were also aired, featuring cast members from Grange Hill and EastEnders.

First Class was notable for its use of video games; such footage (of arcade games in particular) was a rarely seen on UK television at the time and the show aired several years before GamesMaster. The designated contestant from each team would earn points by beating the other player's score; rounds would be either turn-based and head-to-head depending on the game / event. The games were often referred to by their events as opposed to their titles, for example the "spring and vault" round or the "clay pigeon shooting".

The music used for the programme's titles was "Airborn" by Mike Oldfield, from his 1979 album Platinum.

First Class is 2008 Singaporean comedy television series produced by local TV station MediaCorp.

This new comedy series takes a humorous yet insightful look at the education system in Singapore - specifically, Secondary School.

The interactive website was a Nominee for 2009 International Digital Emmy (Children & Young People).

First class is a travel class on some passenger airliners intended to be more luxurious than business class, premium economy, and economy class. On a passenger jetliner, first class usually refers to a limited number (rarely more than 20) of seats or cabins toward the front of the aircraft which have more space, comfort, service, and privacy. In general, first class is the highest class offered, although some airlines have introduced new classes above this. Propeller airliners often had first class in the rear, away from the noise of the rotating propeller.