History and Type of OS

History of command prompt

in 1970s the technology was not advanced as today.
Earlier we couldn’t see the colors on the screen. In fact there is no mouse those days.
We didn’t have the powerful machines to process images.

How did we interact with the computer?

By using a special black screen which takes commands as input.

(Insert the img from vdo)

In that whatever command we write that will be executed.
By executing that command we get the output.
But nowadays we use different kinds of operating systems.

What is operating system?

The interface between the user and the computer hardware is known as operating system. In other words, An OS is a collection of software that manages computer hardware resources and provide common services for computer programs.

Ex: windows, Linux, Mac OS, Android etc

Types of operating systems:

There are two types of operating systems. They are:

1.GUI:

The GUI stands for graphical user interface.
It is a type of user interface that allows users to interact with the computers.
It is a user friendly.
Easy for people to use the computers.

EX: Windows, Mac OS, Android.

2.CLI:

CLI stands for command line interface.
It is a text based interface where users interact with the computers by typing commands.
CLI is often used by developers, administrators and power users who provide the efficiency and flexibility of typing commands.

EX: MS-DOS, Unix, Linux.

NOTE

All operating systems started out as CLI based operating systems. slowly with time some got upgraded to GUI.
We continue to use CLI based systems because they are comparatively simple in few cases.
Meaning, In few cases the UI gets cluttered for certain applications. So In those cases using the CLI helps to solve the problem.