Chapter 0. A computer is a calculator.

For someone unfamiliar with computers, CPU is a very complex word. Because it's an acronym for something, it's impossible for a layperson who doesn't know what it stands for to guess its meaning or role just from the name.

C: The Central part of the computer
P: Processing tirelessly
U: Unit

A computer is a very fast calculator.
But it's a calculator with a storage function.
It's a calculator with both storage and super-fast calculation, and it shows the results not as simple numbers, but with vibrant colors, shapes, and sounds.
It's a super-speed calculator that calculates using tiny electric bits moving incredibly fast along circuits, not with slow hand and foot movements.
It's a calculator where the electric bits move so fast that they easily generate frictional heat, causing it to age over time.
It's a flexible calculator that can create and save special calculators for specific purposes and then load them again.

And… it’s a kind and capable calculator that, by once again utilizing the property of electricity to move at high speed, allows people who are very far away to communicate in an instant.

This short, everyday description of a computer, in fact, contains almost all the fundamental concepts needed to understand a computer.

In this CPU chapter, we will cover the computer as a calculator, which corresponds to the first sentence, "A computer is a very fast calculator."