2.1. Ones And Zeros
Computers handle all data as
bits.
A bit is kind of a switch that can be on or off.
Bit's value one when the switch is on, and zero when the switch is off.
![](/guide/mem.png)
That's how data in computer's memory is saved, too.
Big bunches of bits - ones and zeros - can present all kind of data that a computer handles:
programs, text, images, videos, etc.
Bits in one of the first computers,
ENIAC:
one bulb per bit.
Bits in a modern computer.
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Next: 2.2. Byte
2. Computer Memory
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