The Information Technology Infrastructure Library (ITIL) is a set of concepts and policies for managing the Information Technology (IT) services (ITSM), developments and operations. ITIL gives a detailed description of a number of important IT practices with comprehensive checklists, tasks and procedures that any IT organization can tailor to its needs. ITIL is published in a series of books, each of which covers an IT management topic. The names ITIL and IT Infrastructure Library are registered trademarks of the United Kingdom's Office of Government Commerce (OGC).