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Code Quest

Code Quest is a free, open school of computing, from the first switch to processors, compilers and algorithms, in three languages.

Part of a family of learning platforms with Math Quest, Physics Quest, AI Gate and Qubit Quest.

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© 2026 Code Quest01000011 01010001 · 2⁶⁴ = 18 446 744 073 709 551 616

Inside the Machine/Lesson 1 of 2

Sparks· 1-bit

💡

On and off

Computers are made of switches. One switch is one bit, and bits make numbers.

8 min 40 XP

Step 1 of 10

Bit

Hi, I'm Bit! I'm a tiny chip, and my name is also the name of the smallest thing a computer can know: one switch that is on or off. Today you'll see that a computer is nothing but switches, lots and lots of them.