Jeff's last name, "Kainzow" is "Wozniak" spelled backwards. This is an homage to the co-founder of Apple: Steve Wozniak, who infamously spelled his name backwards as "Evets Kainzow" when submitting his Tetris high scores to Nintendo Power magazine after Nintendo stopped accepting his high-score submissions.
The address that comes out of Jeff's printer is the address to the garage where Steve Jobs co-founded Apple in 1976.
Both NES games featured in 1986 were released in the year 1986.
Apple actually did attempt to launch a clothing line in 1986, one year after Steve Jobs was removed from Apple.
The schematics seen in the "N.A.R." ending are actual schematics of the 1984 Macintosh's motherboard.