Information Systems

he term information system (BCIS, IS) sometimes refers to a system of persons, data records and activities that process the data and information in an organization, and it includes the organization's manual and automated processes. Computer-based information systems are the field of study for information technology, elements of which are sometimes called an "information system" as well, a usage some consider to be incorrect.In this way, the term "information system" has different meanings:

* In computer security, an information system is described by three objects (Aceituno, 2004):

o Structure:

+ Repositories, which hold data permanently or temporarily, such as buffers, RAM, hard disks, cache, etc.

+ Interfaces, which exchange information with the non-digital world, such as keyboards, speakers, scanners, printers, etc.

o Channels, which connect repositories, such as buses, cables, wireless links, etc. A Network is a set of logical or physical channels.

o Behavior:

+ Services, which provide value to users or to other services via messages interchange.