of the MHP standard. Later, DVB presented the specification Globally Executable MHP (GEM) to facilitate the use of MHP's elements in other standards. OCAP's most recent versions use GEM instead of MHP as their base, but they still refer to some MHP elements that are not included in the GEM specification. ACAP (Advanced Common Application Platform) ACAP was created by the Advanced Television Systems Committee (ATSC) as a common base for all systems of interactive TV in USA, via cable, terrestrial, or satellite. It is also based on GEM while adding some of OCAP's elements adapted for the USA market. See also Hybrid Broadcast Broadband TV Project Canvas Open IPTV Forum Teletext Videotex Ceefax Minitel Further reading MHP: https://web.archive.org/web/20060421101018/http://www.mhp.org/ MHEG: http://www.mheg.org/ Canal+ Technologies: https://web.archive.org/web/20071223011417/http://www.canalplus-technologies.com/ Open TV: http://www.opentv.com Steven Morris and Anthony Smith-Chaigneau, "Interactive TV Standards: A Guide to MHP, OCAP, and JavaTV". Elsevier 2005. References Interactive television Interactive television standards Television transmission standards