Computer Science / Unit 6 CS 0292 short lesson, about 20 seconds
The Mediator
Captions available
The idea
Applications do not manipulate hardware directly — they ask the operating system to act on their behalf, and the OS mediates every program's access to processor, memory, storage, network, and devices.
In practice
A ticket app requesting the camera goes through the referee, never around it.
Where people slip
The asking is the architecture.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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