Go concurrency simplified. Part 4: Post office as a data pipeline

Desk worker Bob passed box to the back office Desk worker Bob received football Desk worker Bob started checking ID of the customer with the football item... Back office worker Martha finished processing teddy bear Desk worker Bob finished checking ID of the customer with the football item Desk worker Bob started passing football to the back office... Desk worker Bob passed football to the back office the desk is closed - time to go home Back office worker Martha received football Back office worker Martha started processing football...