The legal technology landscape is evolving rapidly, creating a whole new vocabulary of artificial intelligence (AI) related terms and phrases. For those who are not product developers or software engineers, it is helpful to define what these terms mean. This Practice Note is designed to provide legal professionals with a better understanding of key AI concepts. The basics • Algorithm: a coded set of instructions for software that solves a problem or performs a computation • Artificial Intelligence (AI): computer software and systems that are capable of demonstrating human intelligence. They can learn, plan, reason or process natural language as they go rather than only relying on pre-programmed tasks, eg speech recognition, computer vision, translation between (natural) languages, as well as other mappings of inputs. In the EU and UK, different approaches have been taken to defining AI, see Practice Notes: The EU AI Act and Artificial intelligence—UK regulation and the National AI Strategy • Natural Language Processing (NLP): a type of AI used to analyse, understand, and generate human language. For legal documents, NLP analyses