ITSO may refer to:
- ITSO Ltd, previously Integrated Transport Smartcard Organisation, who maintain the ITSO standard for smart ticketing in the UK
- International Telecommunications Satellite Organization, an intergovernmental consortium
- Information Technology Student Organization, a student organization at Rochester Institute of Technology
- International Technical Support Organization, the IBM group that produces IBM Redbooks.
This disambiguation page lists articles associated with the title ITSO.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: