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Android

Android is a mobile operating system developed by Google. It is based on a modified
version of the Linux kernel and other open source software, and is designed primarily for
touchscreen mobile devices such as smartphones and tablets. It is the most popular and
commonly used mobile operating system.
iOS

iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc.;
exclusively for its hardware. It is the operating system that presently powers many of the
company’s mobile devices, including the iPhone, iPad, and iPod. It is the second most popular
mobile operating system globally after Android.

COMPONENTS OF GRAPHICAL USER INTERFACE
A Graphical User Interface (GUI) includes graphical elements, such as windows, icons and buttons. The term
‘GUI’ was created in the 1970s to distinguish graphical interfaces from text-based ones, such as command line
interfaces.

A GUI uses menus and icons to choose commands, start applications, make changes to documents, store files,
delete files, etc. You can use the mouse to control a cursor or pointer on the screen to do these things, or you can
alternatively use the keyboard to do most actions. A graphical user interface is considered user-friendly.

The actions in GUI are usually performed through direct manipulation of the graphical elements. Apart from
computers, GUIs are used in many handheld mobile devices such as MP3 players, portable media players, gaming
devices, smartphones and smaller household, office and industrial controls.

The first commercially available computer with a GUI was the 1979 PERQ workstation, manufactured
by Three Rivers Computer Corporation.

Let us learn about the various components of a typical GUI.
Desktop Icons Desktop Background

When we switch ON a computer system, Windows is the first software
that starts on its own. This process takes a few minutes. Once the process
is finished, a screen known as the Desktop appears.
The Windows Desktop consists of the wallpaper, icons, and a taskbar.

Let us learn these components in detail.
Wallpaper Taskbar
The term ‘Wallpaper’ is used for the background picture of the Desktop.

Icons
The small pictures that represent a program, a file or a folder are called icons. These icons are used to open
specific programs or documents.

Taskbar

Taskbar is the long horizontal bar at the bottom of the Desktop. It has a Start button, Task View, Talk to Cortana,
Opened program icons, Clock, and Show Desktop button.

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