See the titles at: social.technet.microsoft.com/Forums/en-US/Forefrontedgegener‌​al/… for a quick overview of what people that use the product post about it as. I'm suggesting that for ease of use, better SEO, and simple populist rationalism, that SF adopt the most common acronym for the major tag. On other versions - an announcement is being awaited on the future of TMG, so perhaps not. On people calling anything forefront 2010 including antigen - it's an ambiguous tag, and should arguably just be removed (unless there's a gentle way of coaching people not to use an umbrella brand)

a) the synonymed tags should all route to the same product. They're currently just mildly renamed versions of each other. b) everyone that uses TMG calls it TMG, including the product group (see the ISA team blog). The second part doesn't matter as much as the suboptimal routing to different-yet-synonymous-but-not-synonymed end tags.