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Back is the part of the seat where the back rests . The backrest must be designed in such a way that the person can sit comfortably and adopt a position It is beneficial for your bones and joints.

The ideal position involves little tension and an expense of Energy minimum. The backrest of the seat, in this sense, has an important role to help the subject maintain a proper posture and avoid pain, fatigue and potential injuries. For example: “I don't like the back of this chair: it makes my back hurt”, "The company bought chairs with ergonomic backrest for the welfare of employees", “Please, look for a seat with a back for grandpa”.

In another, more symbolic sense, the backup is a warranty, protection or support : “Yamila was able to study in Europe thanks to the support of her family”, "Since childhood, Lionel Messi had the support of his parents to devote himself to football", “I would love to buy this house, but I need financial support to pay the mortgage”, "The president has supported the questioned governor".

In the field of computing , the notion of backup is used to name the backup copy or backup . Those documents considered important by the user are those that deserve to have a backup (that is, a copy for security reasons). In this way, if for any reason the original file is lost or damaged, the user can appeal to the backup.

The do you copy Security are usually stored on pendrives, CDs, DVDs, in the cloud or on a hard disk, although it is important that they are in a different drive than the original file to prevent the information from being lost.

Backup center

It is called center backup to a data processing center (usually known as CPD, the site where an organization locates the resources it needs to process its information) that is created to control another CPD if a problem occurs.

The big ones companies, such as a bank, they cannot contemplate losing their customers' information or stop operating if a problem occurs in their processing center. Possible emergencies include fires, earthquakes and acts of terrorism; Although these are not normal situations, they are likely, and such a large company must be prepared to deal with them.

The design of a backup center shares the basis of a normal CPD, but there are certain key points to consider:

* The ubication: It is essential to choose a different geographical location from the main CPD, to avoid having the same emergency situation affect them both. In general, the average distance is 30 kilometers and is closely linked to the limitations of the technology of communications used by the company;

* compatibility: all teams and systems Computer systems used to build the backup center must be 100% compatible with those of the CPD to which they replicate, although not necessarily the same. It is important to clarify that it is not necessary to be able to perform all the tasks of the original CPD in case of an incident, but that criticism is enough. For this reason, the possibility of using smaller caliber components is contemplated and a distinction is made between White room (when the main CPD is accurately copied) and back-up room (if similar equipment is used);

* the software: Although the hardware may differ in power, it is imperative that programs are the same, have been updated to the same versions and have been equally patched;

* the data: all the information in the main CPD must be in your backup center, which is not always possible and represents a large risk for customers

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