What is a computer? What is its definition? A computer is a programmable machine designed to sequentially and automatically carry out a sequence of arithmetic or logical operations.programmablemachine It is a general-purpose machine that processes data according to a set of instructions that are stored internally either temporarily or permanently.

Computer Parts:

Types of Computers:

1. First Generation ( ) Vacuum Tubes: They were often enormous, taking up entire rooms. They were very expensive to operate and in addition to using a great deal of electricity, generated a lot of heat. 2. Second Generation ( ) Transistors: Transistors replaced vacuum tubes. 3. Third Generation ( ) Integrated Circuits: To increase the speed and efficiency, transistors were miniaturized and placed on silicon chips, called semiconductors. 4. Fourth Generation (1971-Present) Microprocessors: thousands of integrated circuits were built on one silicon chip to have micro processors. 5. Fifth Generation (Present and Beyond) Artificial Intelligence: based on artificial intelligence, are still in development, though there are some applications, such as voice recognition, that are being used today.

 Crash Your computer or application no longer works correctly and so you "loose" all the work you've done since the last time you saved.  Creating A File Storing data as a file with an assigned file name that is unique within the directory it resides in.  Delete To remove an item of data from a file or to remove a file from the disk.  Desktop An on-screen representation of a desktop such as used in the Macintosh and Windows operating systems.  Disk Space This is the place where your files live. The greater the disk space the more files you can keep. More disk space is always better than less.  Documents Files you create and edit.  Document Files Files we care about (memos, letters, pictures, etc.)  Double Click To press the mouse button twice in rapid succession without moving the mouse between clicks.  Drag To move an object on screen in which its complete movement is visible from starting location to destination.

 Edit To make a change to existing data.  Icons In a graphical user interface (GUI), a small, pictorial, on screen representation of an object, such as a document, program, folder or disk drive.  Keyboard This if the primary text input device. It also contains certain standard function keys, such as the Escape key, tab, and arrow keys, shift and control keys, and sometimes other manufacturer-customized keys.  Menu Displays a list of commands, some with images next to them.  Mouse Pointing device that allows you to tell the computer what to do.  Operating System (OS) System software that allows your computer to work.  Pointer (AKA Cursor) The name of the arrow (or other shape) that tracks across the screen as you move the mouse (or other pointing device) around.  Recycle Bin Place where you put files and folders that you may later want to delete or get rid of. Compare Trash.  Right click To press the right button on the mouse.  Shut down To quit all applications and turn off the computer.  Software Instructions that tell the computer what to do.  Restart  To turn off the computer and automatically turn the computer on again.

How to create a folder? 1. Right-click on an empty place on the screen. 2. Choose (or select) New. 3. Select Folder. 4. Write a name to the folder. How to rename a folder? 1. Right-click on the created folder. 2. Choose Rename. 3. Write an other name to the folder. How to delete the created folder? 1. Right-click on the folder. 2. Choose Delete. How to restore the deleted folder? 1. Open Recycle Bin on the screen. 2. Right-click on the deleted folder. 3. Choose Restore.

A number of questions about computer: 1. How can we start computer ? 2. How can we shut down computer? 3. How can we restart computer? 5. How can we create a folder on the screen? 6. How can we delete the created folder? 7. How can we restore the deleted folder?