What is ITIL? According to Axelos, ITIL is an acronym for “Information Technology Infrastructure Library”. It is a series of process books that outline the best practices for managing your IT services. ITIL was developed by the British government in the 1980s and was revised during the early 2000s developing into the series of volumes that it is today. ITIL has been implemented by various users from around the globe that number in the thousands. It is the most widely accepted IT best practices approach and is used by many major organizations. Some of these organizations include Microsoft, HP, Fujitsu, IBM and NASA, and there are many more. One of the added benefits of having such a widely-adopted program is that an entire industry can develop a common vocabulary and facilitate the overall communication among IT professionals.