Machine Learning is a sub-field of Artificial Intelligence.  Within Machine Learning there are subtopics:

• Supervised Learning
• Semi-Supervised Learning
• Unsupervised Learning
• Explanation Based Learning
• Decision Tree Learning
• Data Classification and Rule Induction
• Inductive Logic Programming
• Reinforcement Learning
• Artificial Neural Networks
• Conceptual Learning and General-to-Specific Learning (Version Space)
• Statistical and Bayesian Learning
• Computational Learning Theory
• Genetic Algorithms and Evolutionary Computing
• Belief Networks – Bayesian and Markov (Computational Uncertainty).

And there are other subfields not listed.  Please note that Support Vector Machines (SVM) are a form of supervised learning developed from Computational Learning Theory.