Spectators Balcony (Spotters Corner)If you're not a professional pilot but want to discuss issues about the job, this is the best place to loiter. You won't be moved on by 'security' and there'll be plenty of experts to answer any questions.
ACARS, this is most probably OO-DHS B727-223F once of European Air Transport / DHL and prior to that N6836 of American Airlines. Google OO-DHS and you'll get plenty of photos of it.