Industry + Work | 1970 | Sound | Colour
In letter delivery and the Post Office, how does the post code work? The class address a letter to a postal address. The letter is posted in the red post box. The postman collects the letters from the post box. The letters are delivered to a sorting office. The letters and packets are separated. Envelopes are sorted by size. The postcode is manually sorted by a man, dots are typed on each letter in a pattern which corresponds to the postcode. A machine reads these dots and sorts the letters for delivery.
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