Number Systems & Encoding
Build the core computing literacy that everything else depends on: character encoding, bit-level representation, and the number systems used across operating systems, networks, and programming, then pressure-test it with live demos and bit-switch games.
Character encoding basics, control characters, and a live text-to-hex view.
Learn bits, bytes, place values, and how computers interpret ones and zeros.
Connect everyday numbering to place values, conversion, and computing context.
Use base-16 to bridge human-readable values and machine-level binary data.
Practice
The floating binary practice pages now live here, together with a dedicated practice area for quick drills and visual learning.
Why It Matters
Binary explains how machines store and process information. Decimal keeps the human view readable. Hexadecimal compresses long binary values into a format that engineers can scan quickly. ASCII connects numeric codes to visible characters and control symbols.
Once these ideas click, networking, scripting, memory analysis, file formats, and protocol analysis all become easier to reason about.
Quick Reference
| Dec | Bin | Hex |
|---|---|---|
| 0 | 0000 | 0 |
| 1 | 0001 | 1 |
| 2 | 0010 | 2 |
| 3 | 0011 | 3 |
| 4 | 0100 | 4 |
| 5 | 0101 | 5 |
| 6 | 0110 | 6 |
| 7 | 0111 | 7 |
| 8 | 1000 | 8 |
| 9 | 1001 | 9 |
| 10 | 1010 | A |
| 11 | 1011 | B |
| 12 | 1100 | C |
| 13 | 1101 | D |
| 14 | 1110 | E |
| 15 | 1111 | F |