Board Thread:Questions and Answers/@comment-394774-20150224185718/@comment-394774-20150225001259

Dang, keep getting logged out for some reason.

A few other bits either way:

What appear to be old scans of the Handbook of the Marvel Universe show all caps:

http://3.bp.blogspot.com/-QG3iHkXA0WU/U4tCJRLevyI/AAAAAAAAM8Q/_EO2QmLn1s8/s1600/Hydra+by+Stefan+Tosheff.jpg

http://s551.photobucket.com/user/akachopper/media/final/viperref001.jpg.html

http://2.bp.blogspot.com/-SqUiDf0EIYw/UHwvVvK2-OI/AAAAAAAAHfE/563Lv9o-wAk/s1600/imperial+hydra_Dwyer.jpg

But multiple source claim that the Handbook lists it in mixed-case, so I have to assume that's a change with the current version since I don't have a copy available. (Sources include Wikipedia and http://boardgamegeek.com/thread/1198940/hydra-or-hydra).

This site uses mixed case for the title then reverts to all-uppercase, claiming "It doesn't stand for anything, it's not an acronym, but they're a self-important organization so they like to have it in all caps where possible": http://www.classicmarvelforever.com/cms/hydra.html

Here's at least one Marvel.com article talking about Hydra that uses all-caps, albeit primarily in reference to the comics: http://marvel.com/news/movies/14348/essential_cap_hydra

But even the cited sources that uses the all-uppercase are all 616 and largely older sources, and most modern sources (including the comics I linked to above) all use mixed-case, as does Marvel in their press releases.