Here is an interesting comparison of Cortana over the course of the 4 halo games:
PTesh adds his dulcet prepubescent tones over the top of one of the new trailers for weapons...
Try upgrading your browser to Google chrome (you wont regret it). There is probably an IE...
Frankie's Face on Moon
Once again Frank O'conner's face is printed on a texture as an Easter Egg by Bungie.Frankie was Bungies weekly update writer and community manager for some years and was much loved by the community. He is printed on the moon on the map Standoff if you got the Heroic Map Pack. But the Easter Eggs don't stop there. Another one is of a Bungie employee standing on the platform of the satellites you can see in another Easter Egg within the list.