1 Introduction

2 A Brief History of Intelligent Personal Assistants
2.1 Timeline View of the Intelligent Personal Assistants History
2.2 Technical View of the Intelligent Personal Assistants History

3 Personal LLM Agents: Definition & Insights
3.1 Key Components
3.2 Intelligence Levels of Personal LLM Agents
3.3 Opinions on Common Problems

4 Fundamental Capabilities
4.1 Task Execution
4.2 Context Sensing
4.3 Memorizing

5 Efficiency
5.1 Efficient Inference
5.2 Efficient Customization
5.3 Efficient Memory Manipulation

6 Security and Privacy
6.1 Confidentiality
6.2 Integrity
6.3 Reliability

7 Conclusion and Outlook