How Computer Work

Computer Basics:


We use the computer to carry out tasks. The tasks may be to calculate, to prepare ma letter or a report, to find information on the internet, to draw a picture, a chart or graph or simply to entertain us by playing music, playing a movie clip or by playing games with us. In doing these tasks, the computer interacts with us.

We tell the computer what to do by typing on the computer keyboard, or by pointing with the mouse. The computer responds by running an appropriate software program and follows it up with messages or pictures on its monitor screen with or without sound from its speakers. Therefore, to accomplish a task using a computer, you need a combination of computer hardware, special programs called software, and input from yourself.

Hardware consists of devices, like the central processing unit (CPU), the monitor, keyboard, printer, mouse and speakers. Inside your computer there are more bits of hardware, including the motherboard, where you would find the main processing chips that make up the central processing unit (CPU). The hardware processes the commands it receives it receives from the software, and performs tasks or calculations.

How They Work Together:


1. The monitor, through which the computer converses with you.
2. The Read Only Memory (ROM) chip that loads the boot-up program when you start the computer.
3. The Hard Disk Drive (HDD) from which the computer loads the application program or stored data.
4. The Central Processing Unit (CPU) which is the brain of your computer.
5. The Keyboard through which you talk to the computer.
6. The Mouse which is another device to send inputs to the CPU.

First, you provide input when you turn on the computer. Then the system software tells the Central Processing Unit (CPU) to start up certain programs and to turn on some hardware devices so that they are ready for more input from you. This whole process is called booting up.


The next step happens when you chose a program you want to use. You click on the icon or enter a command to start the program. Let us use the example of an Internet browser. Once the browser program such as the Internet Explorer or Netscape Navigator has started, it is ready for your instructions. You either enter an address called a URL (Uniform Resource Locator), or click on an address you have saved directly

If you want to print the Web page you see, you can click on the printer icon. Again, you have provided input to tell the computer what to do. The browser software will check to check to see whether you have a printer attached to your computer, and whether it is turned on. It may remind you to turn on the printer, and then send the information about the web page from your computer over the cable to the printer, where it is printed.

The Hardware Parts:

What we will describe here is a typical desktop personal computer complete with the ability to connect you to the Internet through your telephone line and play music video for you entertainment. Virtually all personal computer (or PCs) available in the market will fall in this category, with some additions or omissions. Most PCs have a Central Processing Unit or CPU as their brain, a monitor as their output device and a keyboard plus a mouse as their input device. In addition, the computer will have permanent memory known as Read Only Memory or ROM on fixed or hard disk drives and temporary memory as silicon chips called Random Access Memory or RAM. The permanent memory includes your computer’s software programs as well as data that you wish to certain for future use.

The permanent memory is not lost when you switch off your computer is running. Everything in the computer’s temporary memory is lost when you shut your computer down. These hardware items from the bare essentials of the physical parts of a working PCs In your PCs there many additional hardware items called peripherals such as a CD-ROM drive or a printer.

HP Web Connected Home Printer

HP Web Connected Home Printer

HP has unveiled a web-connected printer designed to let consumers access and print content directly from the web without the need to turn on their PC.

The HP Photosmart Premium with touchSmart Web is claimed as the world’s first web-connected home printer. The inkjet device features a 4.33 in touch-screen display, through which users can connect to content available on the web.

According to HP, the device will allow consumers to print customized content from news sites, search for movies showing in their local area and book and print tickets in advance, as well as print photos directly from the web.

Inside the device is a new web-based printing platform using custom applications to access content. Buyers will receive some apps ready loaded on the printer, and will be able to download new ones published on an HP Apps Studio site.

“By giving access to the content they want at the touch of a finger, the ability to customize their printing experience and create their own apps, and enabling easy ‘one touch’ wireless setup, we are driving a significant shift in how people will be printing in the future,” said HP’s vice president Vyomesh Jishi.

The initial partners providing content are mostly US-based, including Google (Google Maps, USA Today, Coupons Inc, Nickelodeon, Web Sudoku and Weathernews Inc.

HP said that users of its Snapfish photo sharing service will be able to print photos directly from their account, and also from the HP Creative Studio web site for custom greetings cards, calendars and stationary.

The HP Photosmart Premium with TouchSmart Premium with TouchSmart Web has print, fax, copy and scan capabilities, and wired and wireless connectivity options.

Users can print directly from Wi-Fi-enabled PCs, Bluetooth-enabled devices and Apple’s iPhone and iPod touch, according to HP. The Indian pricing and launch date is yet not known.

Mouse

The tangible, visible, and material parts of a computer or other system is know as Hardware of system. Computer hardware comprises of electronic components, such as, CPU and monitor.

There are two types of hardware devices input and output:

Mouse:

A mouse is an input device that is important for graphical user interface because you can simply point to options and click a mouse button. These types of applications are often called point-and-click programs. A mouse may have one, two, or three buttons. The function of each button is determine by the program that uses the mouse.

Moving the mouse on a flat surface produces a corresponding movement of a pointer on the screen. “A mouse may be classified as a mechanical or an optical mouse, on the basis of the technology it uses. In a mechanical mouse, the ball that projects through the bottom surface rotates as the mouse is moved along a flat surface.

The direction of rotation is detected and relayed to the computer by the switches inside the mouse.


If am talking about optical mouse than, An optical mouse uses a light beam instead of a rotating ball to detect movement across a specially patterned mouse pad. MSC Corporation makes the optical mouse that uses Light Emitting Diode (LED) and photo-detectors to trap movement.

Types of mouse:

1)Trackball Mouse

2)Joystick Mouse

3)Light Pen Mouse

4)Wireless Mouse

5)Touch Pad Mouse