The Little Data Book on Information and Communication Technology 2017 presents tables for over for 217 economies around the world. It provides comparable data for 2005 and 2015 on key ICT indicators covering the economic and social context, the structure of the information and communication technology sector, sector efficiency and capacity, and sector performance related to access, usage, quality, affordability, trade, and applications. The glossary contains definitions of the terms used in the tables.