I remember HIG, surely (having read it many times, first for pleasure and now as a developer), but it was always H+I+G, never H+I+something else. But I can be mistaken...

Edit: It doesn't matter if you're an iOS/OS X developer or not. Even if you're a web designer, you should really read Apple's HIGs carefully and thoroughly. They're (by any definition of the word), "great".

http://developer.apple.com/library/ios/#DOCUMENTATION/UserEx...

https://developer.apple.com/documentation/userexperience/Con...