Software for law firms and legal professionals that enables reviewers to conduct document review on a computer or tablet. Features typically include the ability to search documents, assign or review document batches, create and apply tags (as for relevance, responsiveness, topicality, hotness, or privilege). Advanced document review software employs technological aides such as predictive coding, concept clustering, and other computer-assisted review techniques. Sometimes includes the ability to create, Bates number, and export or produce digital images, as in response to a subpoena or request for production.