Embedded systems often use real-time operating systems to provide limited functionality for special-purpose applications. A real-time operating system can successfully run real-time processes that must respond to events within a certain time period. Real-time systems can be hard, where all delays are bounded to guarantee tasks complete on time, or soft, where critical real-time tasks get priority until completed but delays are not strictly bounded. In contrast, a time-sharing operating system allows many users to simultaneously share computer resources by allocating time slices and passing control between users and their processes.

1. Real-Time Operating System
&
Time Sharing Operating System
Shalendra Nagori

2. Embedded Systems
Embedded Computer are found everywhere.
For example :- car, robots, etc….
operating system provide limited features.
For special-purpose application to implement the
functionality. and other are hardware devices.
These operating system providing functionality desired.
Other hardware devices with application-specific integrated
circuits (ASICs) that perform their task without operating
system
Embedded Systems always run real-time operating system.

4. Real-Time Operating
System
A real time process is a process that
must respond to the events
within a certain time period. A real time
operating system is an operating
system that can run real
time processes successfully

5. Hard and Soft real-time systems
A hard real-time system guarantees that critical
tasks complete on time. This goal requires that all
delays in the system be bounded from the
retrieval of the stored data to the time that it
takes the operating system to finish any
request made of it.
A soft real time system where a critical real-time
task gets priority over other tasks and retains that
priority until it completes. As in hard real time
systems kernel delays need to be bounded

6. Time Sharing Operating System
Time system allows many users to share the
computer resources simultaneously.
For Example :- a mainframe computer that has
many user logged on to it. each user uses the
resources of the mainframe.
The OS allocates a set of time to each user.
When this time is expired, it passes control to next
user on the system.
In time sharing multiple processes are managed.