What kind of humor does Family Guy often use ?
The series makes passing references to quantum chromodynamics ( the appearance of Strong Force - brand glue ) , computer science ( two separate books in a closet labeled " P " and " NP " respectively , referring to the possibility that P and NP - complete problem classes are distinct ) , electronics ( an X-ray — or more accurately , an " F - ray " — of Bender 's head reveals a 6502 microprocessor ) , and genetics ( a mention of Bender 's " robo - or R - NA " ) .