Artificial Intelligence (AI) refers to technologies or systems created by humans that can simulate or expand human intelligence. It uses computer programs, algorithms and data to achieve perception, learning, reasoning, decision-making, creation and other capabilities, with the goal of enabling machines to complete tasks that originally require human intelligence.

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### **Core Concepts**

1. **Simulation of Human Intelligence**

The core of AI is to imitate human cognitive abilities, such as language understanding (such as ChatGPT), visual recognition (such as face recognition), logical reasoning (such as chess AI), etc.

2. **Data-driven**

Modern AI relies on a large amount of data and algorithms to optimize its own behavior by analyzing the patterns in the data (such as the recommendation system recommending content based on your browsing history).

3. **Autonomy**

Advanced AI systems can complete tasks without human intervention (such as self-driving cars).

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### **Classification of AI**

- **Narrow AI**

Focus on specific tasks, such as voice assistants (Siri), image recognition, spam filtering, etc. All currently practical AIs belong to this category.

- **Strong AI (Artificial General Intelligence, AGI)**

Theoretically, it has comprehensive intelligence comparable to that of humans, and can autonomously learn and adapt to any task. It has not yet been realized and belongs to the field of scientific research and exploration.

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