RTOS: Real Time Operating system
Why RTOS:
In OS such as Windows, Linux the main concentration will be speed to execute a task, but in real world th e time at which a task is executed is very important. This means that a task should be executed within this time cannot be handled by general OS
Free RTOS:
It is freely available open-sourced
Concept of Task:
A task is nothing but a program (block of code) that needs to be executed
A task and a thread can be called intermittently
Mohith G 