Computer Science / Unit 5 CS 0235 short lesson, about 20 seconds
The Abstraction Ladder
Captions available
The idea
A computer solves problems down a ladder of abstractions: problem, algorithm, program, assembly, machine code — each layer a building block for the one above.
In practice
A car reads the same way — controls, then engine parts, then raw materials, each level hiding the next.
Where people slip
Every rung exists in every running system.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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