The statistical operation Survey on the Information Society-ESI- Companies, provides regular information on the implementation of New Information and Communication Technology -ICT- in the companies of the Basque Country. Specifically, it records and describes the level of use of the Internet in the different establishments: the systems of Internet access, activities carried out via the Internet, as well as the availability of the website and its main characteristics. It also measures the implementation of E-commerce purchases and sales in economic activity and the means used to carry it out.