introduction of computer

A video introduction of computer

                                        very useful information in this video.

                                          comment for asking question.

Disadvantages of internet

Disadvantages of internet

1. There is a lot of wrong information on the internet. Anyone can post anything, and much of it is garbage. 
2.  There are predators that hang out on the internet waiting to get unsuspecting people in dangerous situations. 
3.  Some people are getting addicted to the internet and thus causing problems with their interactions of friends and loved ones. 
4.  Pornography that can get in the hands of young children too easily. 
5.  Easy to waste a lot of time on the internet. You can start surfing, and then realize far more time has passed than you realized. Internet and television together of added to the more sedentary lifestyles of people which further exacerbates the obesity problem. 
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7.  Internet has a lot of "cheater" sites. People can buy essays and pass them off as their own far more easily than they used to be able to do. 
8.  There are a lot of unscrupulous businesses that have sprung up on the internet to take advantage of people. 
9.  Hackers can create viruses that can get into your personal computer and ruin valuable data. 
10.  Hackers can use the internet for identity theft. 
11.  It can be quite depressing to be on the internet and realize just how uneducated so many people have become in today's society.

Mouse and Keyboard

Mouse

   Mouse is the item of computer hardware. For the pointer it controls, see Pointer (user interface).Physically, a mouse consists of an object held in one's hand, with one or more buttons. Mice often also feature other elements, such as touch surfaces and "wheels", which enable additional control and dimensional input.
A computer mouse is a pointing device (hand control) that detects two-dimensional motion relative to a surface. This motion is typically translated into the motion of a pointer on a display, which allows a smooth control of the graphical user interface. A computer mouse with the most common standard features: two buttons (left and right) and a scroll wheel,which can also act as a third button.

       Keyboard

      Keyboard is the item of computer hardware. A computer keyboard is a typewriter-style device which uses an arrangement of buttons or keys to act as a mechanical lever or electronic switch. Following the decline of punch cards and paper tape, interaction via teleprinter-style keyboards became the main input device for computers.
The standard US Qwerty keyboard has 101, 104 or 107 keys. Of those keys they can (by default) produce 96 unique characters. Additional characters can sometimes be produced using "alt codes" but support is not standard nor guaranteed. Hold Alt type [3 digit or 4 digit number] release alt.

Computer basic component

Computer basic components

               Computers are made of the following basic components.

1. Power Supply- The power supply comes with the case, but this component is mentioned separately since there are various types of power supplies. The one you should get depends on the requirements of your system. This will be discussed in more detail later
2. Motherboard- This is where the core components of your computer reside which are listed below. Also the support cards for video, sound, networking and more are mounted into this board. Microprocessor , Memory
   
   

3. 

   sample(4)

   Hard disk drive- This is where your files are permanently stored on your computer. Also, normally, your operating system is installed here.
   
   CD-ROM drive, Floppy drive
4. Monitor- This device which operates like a TV set lets the user see how the computer is responding to their commands.
5. Keyboard- This is where the user enters text commands into the computer.
6. Mouse- A point and click interface for entering commands which works well in graphical environments.