AI refers to a category comprised of a whole host of technologies that mimic cognitive functions, traditionally ascribed to the human mind, from neutral networks, natural language processing (NLP), robotics, expert systems, to intelligent systems. In the commercial context today, the term is most often used to refer to speech and vision recognition systems, machine learning, and deep learning. Machine learning is a branch of AI where systems can "learn" from data, identify patterns, and make decisions with minimal human assistance. As Adeel Najmi, Senior Vice President, Products at One Network Enterprises puts it, "learning occurs when a machine takes the output, observes the accuracy of the output, and updates its own model so that better outputs will occur." Deep learning, a specialized form of machine learning, uses many layers of neural networks to classify images without extracting features from images.