I felt it a bit sad when Game Developer Magazine closed down in July. Though it was for a long clear that specialist magazines were threatened by, well, the internet, GDMag did provide an edited sense of what was happening in the game industry at any given time (with a North American slant, of course). I also remember poring over introductions to network programming in (it must have been) 1995 or so.
Now the entire back archive of the magazine is available directly for free, in PDF form. http://www.gdcvault.com/gdmag
It is pretty good as a document of 20 years of video game history. Remember when we were all (and all students were) aspiring to be AAA developers? It really happened, and here is the documentation.