Artificial Intelligence (AI) is a broad field of computer science that focuses on creating machines capable of performing tasks that typically require human intelligence. This includes learning, reasoning, problem-solving, perception, and decision-making. AI encompasses various subfields, such as machine learning and deep learning, which allow systems to learn from data and adapt to new situations. 

Key Concepts and Applications: 

Learning: AI systems can learn from data, identifying patterns and making predictions based on the information they are trained on. 

Reasoning: AI can use logic and reasoning to draw conclusions and solve problems. 

Problem-solving: AI can be used to automate tasks and make decisions in various domains. 

Perception: AI can "see," "hear," and "understand" the world through technologies like computer vision and speech recognition. 

Decision-making: AI can analyze data and make decisions based on the information it has learned. 

Examples of AI in Action: 

Self-driving cars:

AI algorithms are used to navigate, detect objects, and make driving decisions. 

Virtual assistants:

AI powers voice assistants like Alexa and Siri, allowing them to understand and respond to human commands. 

Recommendation systems:

AI algorithms are used to suggest products, movies, and other items based on user preferences. 

Medical diagnosis:

AI can assist doctors in diagnosing diseases and identifying patterns in medical data. 

Fraud detection:

AI can analyze financial transactions and identify suspicious activity.