1. HARDWARE
The hardware is the part you can see the computer, ie all components of their physical structure.
The screen, keyboard, and mouse tower of the hardware in your computer.

2. SCREEN
The computer monitor or computer screen is the main output device

3. KEYBOARD
It is part inspired computer keyboard register machines

4. COMPUTER CASE
In computing, the housing tower cabinet, box or computer chassis is plastic or metal frame

5. MOUSE
A pointing device is used to facilitate the handling of a graphical environment on a computer (PC). It is usually made of plastic

6. WEBCAM
The webcams are designed to send live and recorded video and image capture over the network to one or more users. A webcam can also be a digital camera placed somewhere in the world, which is sending video through a web site, so that users can see certain events live.

7. PRINTER
A printer is a hardware device that prints text or graphics on paper. There are several types of printers, including LCD, LED, thermal, inkjet, and dot matrix, but the most recommended are the laser printers.

8. SPEAKERS
The speaker is a device used to play audio from an electronic device. Also called speaker, speaker, speaker, speaker, loudspeaker.

9. SOFTWARE
It is considered that the software is the logical and intangible computer equipment. In other words, the concept of software covers all applications, such as word processors, spreadsheets and image editors.

10. CLASSES OF OPERATING SYSTEMS
Operating systems can be classified as follows:
Multi: Allows two or more users to use their programs simultaneously. Some operating systems allow hundreds or thousands of users simultaneously.
Multiprocessor: Supports opening the same program on more than one CPU.
Multitasking: Allows multiple programs running at the same time.
Multi-leg: Allows different parts of a single program run at the same time.
Real time: Responds to input instantly. Operating systems such as DOS and UNIX, do not work in real time.

11. HOW AN OPERATING SYSTEM?
A user typically interacts with the operating system through a set of commands, for example, the DOS operating system contains commands such as Copy and Paste to copy and paste files respectively. The commands are accepted and executed by the operating system called the command processor shell or command line. Graphical interfaces allow you to use the pointing and clicking on objects displayed on the screen commands.

12. HOW THE OPERATING SYSTEM HANDLES?
A user typically interacts with the operating system through a set of commands, for example, the DOS operating system contains commands such as Copy and Paste to copy and paste files respectively.