Postal Codes and Mail Sorting

A few days back, I wrote about Singapore's Postal Code system and how it has evolved over the past from a 2 digit code to a 4 digit code and finally to the current 6 digit numerical code.  Searched online for a video on how mail sorting is done and am surprised to realise that it is now almost fully automated with computers being able to analyse even handwriting.  Feel free to watch the video below.