"General-interest services" are services considered to be in the general interest by the public authorities and accordingly subjected to specific public-service obligations. They include non-market services (e.g. compulsory education, social protection), obligations of the State (e.g. security and justice) and services of general economic interest (e.g. energy and communications). Article 86 of the Treaty (former Article 90) does not apply to the first two categories (non-market services and state obligations).
See:
Public service
Public service charter
Services of general economic interest
Universal service