In this post we will define in broad features the basic activities carried out by an Information System. Information entry, storage, processing and information output.

Information entry

The input is the process by which the Information System takes the data it requires to process the information.
There are 2 types of entry, manuals: which are those provided directly by each user and automatic: they are information data that come from other systems or modules, better known as automatic interfaces.

The most common data entry devices are: terminals, USB drives, barcodes, scanners, touch pads, keyboard, mouse and voice, among others.

Storage.

Storage is the property of the system that can remember the information stored in the previous session or process. This information is usually stored in information structures called files.
The typical storage unit is hard disks, floppy disks, USB drives or external memory drives.

Information processing.

It is the ability of the Information System to perform calculations according to a pre-established sequence of operations. These calculations can be made with data recently entered into the system or with data that is stored.

This characteristic of the systems allows the transformation of source data into information that can be used for decision making.

Information Output.

The output is the capacity of an Information System to get the processed information or input data to the outside.

Typical output units are printers, terminals, plotters and plotters, among others.
It is important to clarify that the exit of an Information System can constitute the entrance to another Information System or module. In this case, there is also an automatic exit interface. For example, a USB drive or a Bluetooth connection.