Data representation in memory

 Got it! Let's go over the hierarchical data units used in memory and storage representation:

### Data Units

1. **Bit**

   - The smallest unit of data in a computer.

   - Can hold a value of 0 or 1.

2. **Nibble**

   - A group of 4 bits.

   - Can represent 16 possible values (2^4).

3. **Byte**

   - A group of 8 bits.

   - Can represent 256 possible values (2^8).

### Larger Units of Data

4. **Kilobyte (KB)**

   - Typically 1,024 bytes (2^10 bytes).

   - Sometimes used as 1,000 bytes in certain contexts (like disk storage).

5. **Megabyte (MB)**

   - 1,024 kilobytes.

   - 1,048,576 bytes (2^20 bytes).

6. **Gigabyte (GB)**

   - 1,024 megabytes.

   - 1,073,741,824 bytes (2^30 bytes).

7. **Terabyte (TB)**

   - 1,024 gigabytes.

   - 1,099,511,627,776 bytes (2^40 bytes).

8. **Petabyte (PB)**

   - 1,024 terabytes.

   - 1,125,899,906,842,624 bytes (2^50 bytes).

9. **Exabyte (EB)**

   - 1,024 petabytes.

   - 1,152,921,504,606,846,976 bytes (2^60 bytes).

10. **Zettabyte (ZB)**

    - 1,024 exabytes.

    - 1,180,591,620,717,411,303,424 bytes (2^70 bytes).

11. **Yottabyte (YB)**

    - 1,024 zettabytes.

    - 1,208,925,819,614,629,174,706,176 bytes (2^80 bytes).

### Summary of Data Hierarchy

- **Bit**: 1 or 0.

- **Nibble**: 4 bits.

- **Byte**: 8 bits.

- **Kilobyte** (KB): 1,024 bytes.

- **Megabyte** (MB): 1,024 KB.

- **Gigabyte** (GB): 1,024 MB.

- **Terabyte** (TB): 1,024 GB.

- **Petabyte** (PB): 1,024 TB.

- **Exabyte** (EB): 1,024 PB.

- **Zettabyte** (ZB): 1,024 EB.

- **Yottabyte** (YB): 1,024 ZB.

Understanding these units is crucial for grasping the scale of data storage and memory capacity in computing systems.