Machine learning is today the most visible form of AI including deep learning.
However AI is an old subject dealing with the notion of all elements endowing intelligent behavior. Several branches of AI exist beyond ML including but not limited to:
Philosophical Logic
Knowledge Representation
Reasoning and Inference
Expert Systems and Diagnosis
Games
Intelligent Search
Multi Agent Systems
Optimization, Planning and Constraint Satisfaction
Natural Language Processing
Speech Processing
Computer vision - Image and Video
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