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To run a computer, that computer needs an operating system. Operating system helps the computer user manage the computer.
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Operating systems like Unix and later MS-DOS were used on the eve of the computer. These operating systems were based on character user interface. In this system, a computer user had to type specific commands or instructions through the keyboard to use it.
It is playing an important role in the practical application of computers due to the invention of GUI or Graphical User Interface. This method does not require memorizing any commands. It is completely image based, where various tasks can be done using the input device called mouse. A user can operate this method very easily and simply as there is no need to remember the commands. GUI based operating system like Windows, Linux etc.
The main main functions of the GUI method are:
(a) Establishes the relationship between the computer and the user.
(b) Facilitates computer use through icons or images.
(c) exposes each program through a window.
(d) Multiple programs or software can be run simultaneously.
(e) Easy document creation, drawing, simple calculations, internet management and network facilities.
Microsoft Windows
The most popular GUI operating system is Microsoft Windows. In 1995, the famous Microsoft Corporation of America launched the first Microsoft Windows operating system. It was first launched as the Windows 95 operating system. Later, with the advancement of technology, this Windows 95 operating system became widely used as Windows 98, Windows Millennium, Windows 2000 and Windows NT. Currently Windows XP and Windows 7 operating systems are widely used in every computer. This version of Windows will continue to change over time as technology improves.
Use of mouse in Windows operating system
We have learned about the mouse in detail in the previous class. Most of the work in Windows operating system is done by the input device called mouse. Mouse is called a pointing device. The use of "mouse" is essential in Windows operating system. Various mouse buttons help to operate the Windows operating system.
After the Windows operating system is loaded on the computer, the image of a mouse pointer like an arrow (kg) will appear on the computer screen. This image is sometimes seen in different forms as well.
Some important mouse pointers and their functions:
This pointer is the actual mouse pointer on the computer screen.
This pointer is visible when the computer system is busy. Or this pointer appears on the screen when a file is saved.
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This pointer is visible when a window is moved on the screen.
This pointer appears when a text selection is made.
This pointer is used to increase or decrease the width of a window.
This pointer is used to increase or decrease the height of a window.
The mice we use today usually have two buttons and a school button. The button on the left is called the left button and the button on the right is called the right button. Here is a step-by-step description of how these buttons work.
(a) Click
Pressing the left mouse button once is called a click. Once the mouse clicks on the icons located on the desktop, the icons are selected.
(b) Drag
If an icon on the window desktop or any object of an application is moved from one place to another by pressing the left button of the mouse, we call it dance.
(c) Drop:
An icon on the Windows desktop can be moved by holding down the left mouse button and then moving it to another location on the screen after releasing the mouse button. That's what we call dropping.
(d) Double Click
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Double clicking the left mouse button twice in quick succession is called a click. Double clicking on an application icon opens that application program on the computer screen.
The icons we see on the Windows desktop are always double-clicked to open applications. That is, the Windows desktop is the place to double click.
(e) Right Button Click
Pressing the right mouse button is called right button click. In the Windows operating system, the right mouse button is often used to perform specific tasks in various application programs. For example, if you select an icon and click the right button, you can do Cut, Copy, Paste, etc.
(f) Scrolling
Most mice these days have a scrolling button with a round wheel between the left and right buttons. In some application software in the Windows operating system, files or documents that have multiple pages can move the document pages up-down or up-down by moving the mouse wheel while keeping the mouse pointer in the document area to read or view each page of those files.
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