# Cambridge International AS Level Computer Science (9618): Section 1: Information Representation

> Binary data representation, prefixes (kibi, mebi), two's complement arithmetic and overflow, Binary Coded Decimal (BCD), ASCII/Unicode character sets, multimedia bitmap graphics and calculations, vector graphics, digital audio sampling, and data compression methods (lossy, lossless, RLE).

- **Track:** [Cambridge International AS Level Computer Science (9618)](https://csmasters.dev/tracks/as-level-9618.md) (CAMBRIDGE AS LEVEL 9618)
- **Module:** Section 1: Information Representation
- **Total Lessons:** 7
- **URL:** https://csmasters.dev/tracks/as-level-9618/course_modules/1-information-representation

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## Module Lessons

### Lesson 1: [1.1 Number Systems & Binary Prefixes](https://csmasters.dev/learn/as-level-9618/number-systems-and-prefixes.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Free Practice
- **HTML Link:** https://csmasters.dev/learn/as-level-9618/number-systems-and-prefixes

### Lesson 2: [1.2 Signed Integers & Two's Complement Arithmetic](https://csmasters.dev/learn/as-level-9618/signed-integers-and-arithmetic.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Free Practice
- **HTML Link:** https://csmasters.dev/learn/as-level-9618/signed-integers-and-arithmetic

### Lesson 3: [1.3 Binary Coded Decimal (BCD) & Character Sets](https://csmasters.dev/learn/as-level-9618/bcd-and-character-sets.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Free Practice
- **HTML Link:** https://csmasters.dev/learn/as-level-9618/bcd-and-character-sets

### Lesson 4: [1.4 Bitmap Graphics & File Calculations](https://csmasters.dev/learn/as-level-9618/bitmap-graphics-and-calculations.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Free Practice
- **HTML Link:** https://csmasters.dev/learn/as-level-9618/bitmap-graphics-and-calculations

### Lesson 5: [1.5 Vector Graphics vs Bitmaps](https://csmasters.dev/learn/as-level-9618/vector-graphics-vs-bitmaps.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Free Practice
- **HTML Link:** https://csmasters.dev/learn/as-level-9618/vector-graphics-vs-bitmaps

### Lesson 6: [1.6 Digital Audio Encoding & Calculations](https://csmasters.dev/learn/as-level-9618/digital-audio-encoding.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Free Practice
- **HTML Link:** https://csmasters.dev/learn/as-level-9618/digital-audio-encoding

### Lesson 7: [1.7 Data Compression: Lossy vs Lossless](https://csmasters.dev/learn/as-level-9618/data-compression-methods.md)
- **Estimated Duration:** 15 mins
- **XP Reward:** 30 XP
- **Access Level:** Free Practice
- **HTML Link:** https://csmasters.dev/learn/as-level-9618/data-compression-methods