by Kaye Dee

In my first article for the Journey, just over three years ago, I talked about rocket mail and flying postmen. Well, we haven’t seen either of them yet – despite continual promises that they are “only a few years away”. This month, though, Australia has taken a step into the future of postal technology with the introduction of Postcode, the new national mail sorting system.

Zipping the Mail Along
Postal codes are not exactly new. They were first developed in large cities like London (where they were introduced in 1857) to help improve the speed of mail sorting and delivery as populations and the size and complexity of cities grew.

Modern postal codes were first introduced in the Ukrainian Soviet Socialist Republic in 1932, followed by Germany (1941), Singapore (1950) and Argentina in 1958. Britain began introducing its current postal code system in 1959, while the US Postal Service introduced the five-digit ZIP code in 1963. I was interested to learn as I prepared to write this article that the ZIP part of ZIP code is actually an acronym standing for Zone Improvement Plan. I always thought that it was just a play on the idea of zipping, or speeding, the mail along to its destination. Switzerland was the most recent country to introduce postal codes before Australia, in 1964.

Mechanising Mail Sorting
What made the Postmaster General’s Department (PMG), which manages all Australia’s postal, telephone and telegraph services, decide that we needed to follow suit and speed up our mail by using a postal code system? After all, Australia’s current population is only 11.87 million – less than the population of New York City, which I understand is about 15.6 million.

Until now, mail sorting in this country has primarily been done by skilled human sorters, who have a detailed knowledge of geographical localities, reading the address on each letter. However, there are about 8,000 delivery offices around the country, so getting the mail to its final destnations has required at least two or three stages of sorting.

Mail sorting at the Sydney General Post Office in 1964

Australia has long been a world leader in in postal service mechanisation, and as early as 1958, the PMG decided to introduce large-scale mechanical mail sorting systems across Australia. As the first stage of this plan, the Sydney Mail Exchange opened in the suburb of Redfern in 1965, to automate and centralise the mail sorting facilities for New South Wales. It’s the largest and most advanced mechanised mail centre in the Southern Hemisphere, and the new electronic equipment and technology is attracting Worldwide interest. I’ve even heard that the Mail Exchange’s design concept is being considered as a possible future system by the US Postal Service.

Sydey's ultra-modern new mail exchange, in the inner-city suburb of Redfern

Sydney is our largest city, and New South Wales, the most populous state, so it makes sense to introduce a new Postcode system to work in conjunction with the state-of-the-art electronic mail handling equipment at the Sydney Mail Exchange, through which so much mail passes. Postcodes simplify the sorting process, as the mail sorter is now a coding operator, who enters the postcode using their data entry terminal, enabling the letters to be rapidly sorted electronically and speedily despatched to their delivery offices.

The Sydney Mail Exchange's state-of-the-art data entry system for the new sorting computers. Conveyors drop individual letters in front of the operators, who then type the postcode or suburb identifying the letter’s destination

The computers controlling this process occupy a large amount of space in the Mail Exchange building. Similar mechanised sorting systems will be gradually introduced around the country over the coming years: they’ll be immediately able to take advantage of the Postcode system to speed their mail sorting, without many of the teething problems that have bedevilled the Sydney mail Exchange.

The Australian Postcode System
The Postcode system was introduced on Saturday, 1 July. The new four-digit number system replaces some earlier postal sorting systems, such as Melbourne's letter and number codes (e.g., N3, E5) and a similar system that has been in use in rural and regional New South Wales. Nearly 5,000 postcodes have been allocated across the country, to every city, town, suburb and small regional centre.

Postcodes have been allocated following a broad geographical pattern, with Postcode numbers for capital city suburbs beginning in the west and moving to the north, east and south. A similar pattern is followed for regional country areas. The first digit of the Postcodes in each station corresponds to radio station call signs for that state: 2 (New South Wales and the Australian Capital Territory – our equivalent of the District of Columbia), 3 (Victoria), 4 (Queensland), 5 (South Australia), 6 (Western Australia), 7 (Tasmania) and 8 (Northern Territory).

I think this is a good idea because everyone knows the radio callsigns, so it will make it easier to remember Postcodes for their friends locally or interstate. Subscriber Trunk Dialing for telephones, which commenced last year, is also using the state radio call sign number as the basis of the dialing codes for each capital city, so I imagine that will help with remembering the direct dial codes too. 

Getting the Word Out

The first edition of the Postcode booklet, listing every national Postcode, is being distributed free by mail this month to every Australian household and business address. A total of 4.5 million booklets are expected to be distributed, along with a postcard identifying the recipient’s own postcode. Of course, with 5,000 postcodes to include in the booklet, and with some geographical oddities to contend with, it’s not surprising that diligent nit-pickers have already found faults in the booklet to complain about and have been writing carping letters to the editors of local and major state newspapers.

There has been extensive advertising about the new Postcode system in the newspapers and on television and radio, but so far, we have not been treated to a catchy jingle like the one that introduced us to decimal currency last year.

The PMG is hoping that if we all start using the Postcodes properly at the end of addresses, not only will it improve the speed of mail delivery, but that next year it will make it easier to introduce “post office preferred-size envelopes” as well, whose standardised sizes will further improve the speed of mechanised mail sorting! 

And then I can finally get my postcards from the Traveler in a timely manner!

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