O Level

Computer Science Complete Subject Notes (O Level | Code: 2210)

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Last Update July 10, 2026

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Curriculum

140 Lessons

1 Data representation

1.1 Binary Data And Number Systems

1.2 Converting Between Denary And Binary

1.3 Hexadecimal Conversions And Uses

1.4 Binary Addition And Overflow

1.5 Logical Binary Shifts

1.6 Two’s Complement Signed Integers

1.7 Representing Text With ASCII And Unicode

1.8 Representing Sound

1.9 Representing Bitmap Images

1.10 Data Storage Units And Capacity

1.11 Image And Sound File Size Calculations

1.12 Data Compression Lossy Lossless And RLE

2 Data transmission

3 Hardware

4 Software

5 The internet and its uses

6 Automated and emerging technologies

7 Algorithm design and problem solving

8 Programming

9 Databases

10 Boolean logic

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