Here we take note of all references to anything in the BTTF Films. It can be a real thing or a parody of a real thing. e.g. Pepsi appears in the films as a real thing, also:

Texaco
Tab (1980's Drink)
Calvin Klien Underwear

Also some real people:

Chuck Berry (Marvin mentions him on the phone in I)
John F Kennedy (Mentioned by Lorraine's dad in I)
Ronald Reagan (Mentioned lots of times in I and appears as a waiter in II)
Calvin Klein (Marty's 1955 name in I and II)
Clint Eastwood (Marty's 1885 name in III)
Isaac Newton (Mentioned by Doc lots of times)