A Passenger Name Record (PNR) is a digital file created for airline bookings that contains passenger and itinerary details. A PNR includes the passenger's name, contact information, flight and accommodation details. Proper name recording in the PNR using title, initials and full names helps identify passengers accurately. The code "NM" is used to enter passenger names, with examples given like "NM1SMITH/JOHN MR" for an individual or "NM2 JUSTINE/JESSICA MS/MARCEL MR" for two passengers with the same surname.