If I'm not mistaken Maple already had technical interactive documents. And Mathematica introduced cdf only in mid 2011, however why is there so much hype about cdf and media coverage about it replacing pdf's. Of course it differs by one letter and probably done so by design. And if pdf is so popular, then so might cdf be in the future. Pretty slick and trick marketing by Wolfram if you ask me.
Also Maple released the maple Player in...
