INPUT OUTPUT COMPUTER

In the computer system is input or the input units and output units or output. The first is the input or the input unit, a computer system in charge of receiving commands and data from outside into the computer. Input unit consists of several tools. Among other

KEYBOARD

Creation of a computer keyboard in the creation inspired by the basic typewriter designs created and patented by Christopher Latham in 1868 and many marketed in 1877 by the Remington Company. The first computer keyboard adapted from pelubang card (punch card) and technology made long-distance transmission (Teletype). Year 1946 ENIAC computer using a card reader makers hole (punched card reader) as input and output devices. When you hear the word "keyboard" then our minds can not be separated from the existence of a computer, because the keyboard is a board consisting of the keys to type a sentence and the special symbols on a computer other. Keyboard in the Indonesian language means keyboard or a keyboard. On the keyboard buttons have the letters A - Z, a - z, numbers from 0 - 9, keys and special characters such as: `~ @ # $% ^ & * () _ - + = <> /,. ? :; " '\ | And special buttons other is a total of 104 keys. While the number of typewriter keys tutsnya is 52. The shape is generally rectangular keyboard, but the current model of the keyboard is vary. In the past the people who use typewriters both regular and electric typewriters. Well, the keyboard has a similarity of form and function on a typewriter. The difference lies in the output or display. If we use a typewriter, we can not delete or cancel any course that has type and every single letter or symbol you type then we see a direct result of the paper. Not so with the keyboard. What do we type in the result or output can be seen on the screen first, then we can modify or make changes in writing, typing errors and others. As well as "mouse", the keyboard is connected to a computer with a cable located on the keyboard. End of the cable is inserted into the port located on the computer CPU.

MOUSE

Basically, pointer (pointer) is known as "Mouse" can be moved anywhere on the direction of movement of small balls contained in the mouse. If we open and pulled out a small ball that is behind the mouse, it will show 2 controllers motion in it. Both the motion controller can move freely and control the movement of the pointer, the one horizontal direction (horizontal) and one vertical (top and bottom). If we only move the pointer horizontally controller will only be moved horizontally on the computer screen. And vice versa if the pointer is moved vertically, the pointer (pointer) only move it vertically on the screen monitor. If we move the second movement of a pointer (pointer) will be diagonal. Well, if the small ball put back, then it will touch the ball and move the second motion controller in accordance with the direction that we move the mouse. At most there are three button mouse, but generally only two key functions, namely the left button and the far right. The influence of key presses or known by the term "Click" this depends on the object (area) that we appoint. The computer will ignore key presses (click) when not on the areas or objects that are not important. Then in the use of the mouse we also know the term "Drag", which means shifting or interesting. When we pressed the button without releasing the left and as he slid, one result object is moving or being moved (copied) into other objects, and there are other possibilities. These possibilities depend on what type of application programs that we run. Mouse connected to a computer with a cable contained in the mouse. End of the cable is inserted in the port located on the computer CPU

SCANER

Scanner is an electronic device that functions much like a copier. Photocopy machine may be a direct result you see on paper while the scanner results displayed on a computer monitor first and then be changed and modified so that display and a good result which can then be saved as text files, documents and images. The shape and size of various scanners, there is a large folio-sized paper there is also a postcard size, even the latest, the new pen-shaped launched by WizCom Technologies Inc. company. Pen-sized scanner can store up to 1000 printed pages of text and then transfer them to a personal computer (PC). Pen-sized scanner is called QuickLink. Pen-sized scanner was six inches long and weighs about three ounces. Scanner WizCom according able to perform the work more quickly at random from a flat-shaped scanner. Differences of each scanner from various brands lies in the use of technology and resolution. The use of technology such as the use of digital switches and lighting techniques.

How a Scanner:
When we press the mouse button to start Scanning, what happens is:

The emphasis of the computer mouse button move the speed control on the scanner. Machine located in the scanner to control the delivery process of scanning units. Then place the process of scanning unit into place or pengiiman the appropriate path to start scanning immediately. Visible lights on the scanner indicates that the scanning activities have been started. After the lights were gone, meaning the scan is complete and the results can be seen on the monitor screen. If the results or display text / image to be changed, we can change it by using software applications available. For example with photoshop, Adobe and others. pot scanned. There are two different kinds of check scanners in the color image is: Scanner which can only be one color scan and save all the colors at that time only. Scanner that can directly be used three times to save a few colors. The colors are red, green and blue. Scaner the former faster than the second, but becomes less good when used for color reproduction. Most scanners run at 1-bit (binary digit / digits binary), 8-bit (256 colors), and 24 bit (more than 16 million colors). Well, if we need a very good result then use the scanner with dianjurtkan great bit color for more resolution and good. So is input. The output adl follows:

PRINTER

Printer in Indonesian language means the printer (print device). The term 'printer' now often used to refer to the printing device connected to the computer. To connect the printer to the computer needed a cable that connects the printer to the computer CPU. Currently, the brand of printer products that are frequently used include Epson, Hewlett Packard (HP), Canon, Lexmark and many more. To know more clearly about the functions, types of printers and how to work the printer, please read the continuation of this article. Printer is one of the hardware (hardware) connected to a computer and has a function to print text, images and more views from computer to paper or similar media. The term is known at a resolution of the printer is called dpi (dot per inch). The point is the large number of points in 1-inch area. The higher the resolution the better the prints will be produced. Conversely, if low resolution printout will then bad / not good.

Printer Type
1. Dot-Matrix Printer

Dot-Matrix printers are printers that print resolution is still very low. Also when is printing, the printer of this type tend to be loud and sound quality to print the image is less well because the printed image will look like dots interconnected. Generally, printers dot-matrix type also had only one color, namely black. But this time the printer is still widely used because it's famous 'naughty' (durable). Another plus, ribbons dot-matrix printer is much cheaper than the toner (ink) for printer inkjet and laserjet type.

2. InkJet Printer

Inkjet printers are devices that have been printed using ink to print and print quality for color images good enough. The speed of the number of pages printed on inkjet printers are not the same, depending on the type of printer brands. But the inkjet printer, the printout to dry longer than laser printers.

3. Laser Printer

Some of the laser printer looks like a copier. Print resources are also quite a lot could reach more than 10 pages per minute. Quality laser printer prints were very good, so much like the original. Also quick-drying printouts. But the price is quite expensive printer.