7 min read
2026-01-25
The binary number system uses only two symbols: 0 and 1. It is the foundation of all digital technology.
Each character has a numeric code (ASCII or Unicode). This code is written in the binary system:
| Character | ASCII | Binary Code |
|---|---|---|
| A | 65 | 01000001 |
| B | 66 | 01000010 |
| Z | 90 | 01011010 |
| 0 | 48 | 00110000 |
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Binary code is usually separated by spaces every 8 bits (1 byte). This makes it easier to read and decode.
Computers use the binary system because electronic circuits have two states: current on (1) and current off (0).
See also: Base64 Encoding, Morse Code, Unicode Lookup