GUI – Operating System (4 – L2) – satei4u

GUI – Operating System (4 – L2)

An Operating System (OS) enables communication between the user and the computer. It manages and controls computer hardware and software. Examples are Windows, Linux, and Mac.

Graphical User Interface (GUI) allows users to interact with computers easily through icons, buttons, and windows.

Elements of GUI


The small pictures that you see on the screen are called icons. The pictures represent an application, document type or shortcut.


The box that appears on the desktop when you start a program or application is called a Window.


A button is used to perform a particular action.

Examples are:

Minimize button: This is used to reduce the current window to a taskbar icon.

Maximize button: This button is used to enlarge a window to make if fill the entire screen.

Close button: This button is used to close the window.

Ubuntu DesktopWindows Desktop
1. The launcher is located vertically on the left-hand side of the desktop1. The taskbar is at the bottom of the desktop.
2. The first icon at the top of the launcher is the Dash. Dash enables users to search for files and applications and also view recently used items.2. It contains the start button in the left corner through which users can locate and launch programs.
3. The launcher contains icons for a quick launch of applications.3. To the right of the start button, by default, there are few pinned applications for quick launch. Users can pin frequently used applications on the taskbar.
4. The icon of every running application appears in the launcher.Taskbar provides quick access to view open and pinned programs.
5. The top bar or top panel displays system messages and shows the time.The right-hand corner of the taskbar displays system messages, dates, and times.

Context menu or Shortcut menu: appears when you right-click on any icon or in the empty space on the desktop. It gives quick access to commands and save times.