'OS' computer abbreviation usually means ?

Solution (By Examveda Team)

The correct answer is C: Operating System.
'OS' is a very common abbreviation in the world of computers.
An Operating System (OS) is the most important software that runs on a computer.
It manages the computer's memory and processes, as well as all of its software and hardware.
Think of it as the conductor of an orchestra, making sure everything works together smoothly.
Option A, 'Order of Significance', doesn't relate to computers or software.
Option B, 'Open Software', is related to software, but 'OS' doesn't stand for it.
Option D, 'Optical Sensor', refers to a type of sensor that detects light, not the fundamental software of a computer.