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Originating in the Latin word instant, instance is the word that refers to act and result of urging (that is, to reiterate or be insistent in a petition, urge the rapid execution of something). For him procedural law , the instances represent the various jurisdictional degrees or stages in which the presentation, analysis and resolution of all matters that can be presented before a court of justice is divided.

The instance covers the group of procedural acts that develop after the start of a case and its corresponding response within the framework of a judgment. For example: “The defendant's defense will appeal before the case goes to the next instance”, “The complaint was filed before the Court of First Instance”, “The judge asked for the participation of new experts in this instance”.

Another use of the concept is linked to the communication model with the Public administration which consists in the presentation of documentation or information To make a claim or a complaint effective: “We have presented an instance to the municipality to fix the pavement”.

It should also be noted that the instance can also mention the degree, stage or level of a social institution (either one organization, a competition, etc.): “The visiting team is already satisfied to have reached this instance”, "Nothing made one suppose that Gomez would make such a decision in such an important instance", "The Spanish tennis player is qualified for the next instance of the tournament and waits for his rival".

The parts of the psychic structure capable of acting and the copy of an executable version of a computer program (software ) that has been written in the memory of a computer or computer also receive the instance name.

More specifically, within the scope of the Object-oriented programming, it is possible to design a type of entity, assigning it different properties and functions, as if creating a mold for a shirt and deciding if it has pockets and, if so, how many, what material should be manufactured, what its proportions will be and in what situation it will be appropriate to use it (an informal meeting, a party gala, etc.) While it is an example away from computer science, taking that mold and making a shirt from it would be instantiating that class of garment.

In the real world, the shirt has already been created and has a name known to all Spanish speakers; but in programming, the developer enjoys total freedom when calling a creation of his, and the only limits will be the taxes imposed by his creativity and by the technology he has available. Current video games are developed by adopting the model of classes, since it allows an extremely complex organization, maintaining an order and control over each element, which can be tens, hundreds or thousands.

Basically, it is possible that in a shooting game set in outer space there are different types of enemy ships, which in this case we will group by colors to simplify the example. The developers will then establish that there are x number of enemy classes, each with its own characteristics and skills (size, maximum energy, attack power, defense level, speed, acceleration, attack types, etc.), and they can create as many individuals of each type as they wish, always within the framework of the logic established for the universe of game.

Therefore, in a certain section of a level five red ships could appear that fly towards the main character and shoot mercilessly; each of them will have the same properties than the rest, but it is necessary to understand that they will not be clones, but rather identical twin sisters.

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