Since ancient times, people have counted, considered and measures things thing, have passed tally and communicated to people about these things. These things could be the number of sheep in a flock, the weight of a child, the size of a field, the time elapsed since the last drought or intensity of an earthquake. Since ancient times, people used tools and techniques that help them to count more accurately, measure more precisely, to keep a tally or make notes which they can keep more time to transmit more accurately. They used for this purpose, for example, rulers, sextants, scales and balances, watched, etc.
The name „Computer” does not bring us much in mind of the small pocket device that solves mathematical calculations faster than we can do. Now denotes something big, strong, able to make like easier in thousand of years. The central unit is, in short, the brain of the computer. Originate here and here commands are processed information will reach us later.
There is more to know about this part, but most are technical things, so initially it is enough to remember that all power is concentrated here in computer. Outside, on the front of the CPU, we see three important elements:
– start button: is the largest button and pressing that button once, briefly, on it, start the computer. In some ccases, for example when the computer stops responding, we can close by pressing and holding the same button until de power is interrupted, but this method is not recommended.
– reset button: is a little button, located near the start button. He forces the unit to resume from the beginning instructions as if she had just been lit computer. It is useful when the computer no longer responding to any commands.
– CD – ROM: Pressing the Eject button opens a compartment where we can insert a CD or a DVD or to read data written on them, wither to transfer computer data. Now there are methods of data storage more efficient and faster than a CD, but we will talk about them later.
Monitor is one component that mediates between user and computer. The monitor looks like a TV in a certain way. IS one component that mediates between user and computer. The monitor looks like a TV in a certain way, that is. The monitor has a start – stop button when the computer is recommended, but not required, to close the monitor to save energy.
Mouse is one of the two essential devices with which you work. The arrow that we see on the screen is called the cursor and mimics the movements we make with the mouse.
Keyboard I’m sure you are familiar with the system QWERTY, the same used on typewriters, but computer keyboard are more complex, and perhaps more complicated, so i booked a separate article to show you how to use each key, which key combinations and what effect there. As i said, these four elements are essential to use a computer effectively.