1. Decimal System ✓

2. Binary System ✓

3. Octal System

4. Hexadecimal System

5. Conversions Between Systems

6. Binary Arithmetic

7. Two's Complement

8. Floating Point Representation (IEEE 754)

9. ASCII - American Standard Code for Information Interchange

10. Unicode (UTF-8, UTF-16, UTF-32)

11. Encoding vs Decoding