Various types of computers have existed and still exist, each suitable for specific circumstances, depending on the potential and size of the devices.
MAINFRAME:
Currently, these systems are used in large corporate groups, public administration, and all those structures that need a processing power proportionate to the large number of users who have to use them. With the development of cloud logic, data farms are the realities where mainframes are used in the broadest sense.
MINICOMPUTER AND MICROCOMPUTER:
These are systems designed respectively, the first in the 60-the 70s of 1900 and the second around the 80-90s, which are primarily similar to what is now called Personal Computers. Given their not very recent design, their characteristics cannot be holy due to the inside boards.
HOME COMPUTER:
Computers were designed in the 90s and positioned on the desk of every home before real Persona Computers were invented. The only substantial difference, apart from obviously the underperforming performance, is that these devices were not "expandable," that is, you could not replace the computer's internal cards with others to improve the entire system.
PERSONAL COMPUTER:
They are computers commonly sold all over the world. They are more performing and give the user the ability to "expand" the entire system, which did not happen with home computers. These devices allow you to support graphics for video games and, if powerful enough, also to assemble programs to design with CAD, in the workplace or not.
WORKSTATION:
General-purpose computers are equipped with higher processing resources and higher costs than standard personal computers and intended for professional use and tasks, often in the graphics or engineering field.
SERVER:
They are computers logically dedicated to particular services required by a client computer within a client-server network architecture such as LANs and the Internet.
SUPERCOMPUTER:
They are a very high processing capacity (often thanks to parallel computing). They are distinct from mainframes because they are usually intended for a single application such as weather, climate forecasts, high-performance scientific computing, and various simulations in general. NASA uses this type of computer to perform very complex calculations to study the characteristics of an explored planet or star.
BAREBONE SYSTEMS:
Pre-assembled personal computers, usually made up of case and motherboard, ready for further customization by resellers or end-users. This system is recommended for experienced users who have sufficient knowledge of computer architecture.
LAPTOP COMPUTERS OR NOTEBOOKS:
Computers were fragile and easy to carry but less performing than Personal Computers. In the family of portable technical-commercial types distinct from notebooks, properly speaking, they are represented by netbooks and ultrabooks.
HANDHELD COMPUTERS:
Computers of reduced dimensions, such as to be carried on the palm of a hand.
TABLET COMPUTER:
Computers the size of a tablet and equipped with a touch screen (e.g., iPad from Apple, Galaxy Tab from Samsung)
SMARTPHONE:
By now, they have very similar characteristics to palmtop computers. In addition to the electronic telecommunications equipment for transceiving, they also have an electronic processing core and a data memory complete with an ad hoc operating system and various applications and, of course, the usual input devices. Output. In recent years they have undergone an evolution perhaps more significant than that of computers.
Other sub-categories:
MICROCONTROLLER:
Complete processors contained in single integrated circuits and dedicated to specific applications (specific purpose) in embedded systems. Internal switching devices in a computer network also belong to this last category.
CONSOLE FOR VIDEO GAMES:
Currently represent the particular purpose home computers with the highest processing capacity to meet the most varied processing needs and the driving sector for the development of new and more advanced processors.
CASH REGISTERS:
The modern cash registers used in commerce are fully-fledged computer tools. The medium-high level ones are regular PC clients (touchscreen type) that access, via the network, the server on which the business or chain management system runs (sales, warehouse, procurement, etc.).
POS:
Devices for making electronic payments are now mini computers.
ATM:
Commonly known as "cash machines," is the computer equipment for everyday operations of the same name
There are also the so-called Virtual Machines: they are software and non-hardware systems that emulate the machine under consideration for what is possible so that you can use what it makes available. It is easy to understand that the emulation may not be perfect in some cases, and therefore, not all the proper operations can be done.
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