Claim: Tile Map Service was developed by the Open Source Geospatial Foundation, a non-profit non-governmental organization whose mission is to support and promote the collaborative development of open geospatial technologies and data.
Evidence: Tile Map Service or TMS, is a specification for tiled web maps, developed by the Open Source Geospatial Foundation. The Open Source Geospatial Foundation (OSGeo), is a non-profit non-governmental organization whose mission is to support and promote the collaborative development of open geospatial technologies and data. 
OSGeo TMS The Open Source Geospatial Foundation (OSGeo), is a non-profit non-governmental organization whose mission is to support and promote the collaborative development of open geospatial technologies and data.