ITSO Limited is a not-for-profit membership organisation, with 165 members from national and local government in England, Scotland and Wales, transport operators, smart ticketing equipment and consultancy suppliers, and interested transport bodies.  ITSO Limited:

• Supports its members to set up and run ITSO-compliant smart ticketing schemes;

• Tests and certifies smart ticketing equipment to ensure it meets the ITSO Specification;

• Ensures the ITSO Specification is fit for purpose, changing to meet new business and technical requirements;

• Provides the security for the entire scheme to assure the validity of cards and tickets and the integrity of transactions.

ITSO Limited is Guardian of the Crown copyright for the ITSO Specification.  The ITSO Board oversees the work of ITSO Limited and is made up of representatives from the different membership sectors.  The Specification was developed with the aim of ensuring that public transport operators throughout Great Britain can develop compatible smart ticketing systems.