|
But I don't have any official information. Sorry.... as an automation clerk, I'm usually one of the last to know anything like that. However, I'm friendly with a couple of our electronic technicians at my plant; I'll be sure to keep myself appraised of anything like that through them.
Mail is currently sorted using a variety of methods, most of them variations on the optical scan process. Mail moves from your mailbox to to local office, where it is sorted by hand into simple categories such as local and outgoing mail, parcels, FAA target mail, etc. (FAA target mail is any parcel weighing more than 16 ounces; such mail is NOT allowed to travel by air for security reasons). Note that, during this process, only the type of mail and the first few digits of the ZIP code are even examined by the employees; we don't know (or care) what it is or who's sending what.
From the local offices, mail is trucked to the nearest or most logical processing and distribution center, which is where I work. From the trucks, mail on the loading dock is further categorized by the mail handlers (a seperate craft from the clerks), with parcels and letters being kept (reasonably) apart from one another. Letter mail goes into a different tub than parcels or oversized envelopes; skids of magazines come in apart from all the rest, for example.
From the loading dock, the mail moves to various parts of the plant for the actual processing. This is the point where human intervention is at a minimum; letter mail geos into a giant hopper/sorter we call Barney (because the machine is big and purple) and is conveyed en masse to the AFCS machines (Automated Facer/Canceler/Sorter). This machine uses an optical character reader, or OCR, to read mail being transported in front of a camera via a dual-belt system: mail is sandwiched between two conveyor belts which move at high speed and the machine reads the handwriting on the envelope, sprays a barcode on it if it's readable, and that gets sorted to a series of bins.
From there, several things can happen. If the mail received a barcode, it gets run on a similar machine to the AFCS, the Delivery BarCode Sorter, or DBCS. The DBCS is a high-speed barcode reader, and that's basically it- 172 individual stackers, one for each three-digit prefix in a zip code, or part of a delivery walk sequence (these machines can actually place the mail in the order of delivery for the carriers' routes!). If, however, the address cannot be read on the AFCS, it goes to the ISS (Input SubSystem). The ISS scans images of the front of the mailpieces and those images are sent via high-speed leased lines to a remote encoding center, or REC site (I've worked at one of those as well).
At the REC site, postal employees code in the necessary information for the image to be properly sorted. For example, were the address the machine couldn't read "1234 Clinton Trail" because it's too garbled or the handwriting is too shaky, the REC site employee would code in "1234CLIT" and the system would know that they're referring to Clinton Trail in the national directory.
After the information has been coded, an ID "tag" (really only data in memory of a computer) is attatched to the information and it's sent back to the plant, where another automated system, the OSS (or Output SubSystem) matches the ID sprayed on the back of the envelope (that's that funny orange barcode on the back of some of the mail you get) to the ID "tag" the REC site people generated. If they match, the envelope is sorted and eventually dispatched to its main location, where this entire process (with a couple unnecessary steps removed) is repeated directly prior to local delivery.
If everything fails, or if someone tried to mail a pen or audiotape that could fit into a "normal" envelope but never be automated, it goes to the "letter aisle" (as it's termed in my plant), a place where all mail is sorted by hand. Thankfully, the automated processes are good enough that the volume of mail being sent to the letter aisle for manual handling is becoming smaller and smaller, but there are always envelopes not suitable for our automated processes.
The machinery is reliable, as you might guess, as well as fast; our DBCS machines can sort around 42,000 pieces per hour, depending on how heavy the individual pieces are. Standard (or "third class") Mail is the heaviest; it's something of a truism that the problem with Standard Mail is that there is no standard :) FIM and DIS mail (FIM, I think, is Firms In Michigan and DIS stands for DIStant, although I'm probably wrong on that last) are the "lightest", being mostly bill payments, business reply mail, and other thin envelopes.
If you have a P&DC near you, give a call to the plant manager and see if you could take a detailed tour if you like. Most plant managers are very open to the idea of the public knowing how our mail is sorted, as it's really an interesting process when taken as a whole. The equipment we use makes it possible for us to rapidly and incredibly accurately sort millions of written missives per day, and that's only in one, large facility. I work at one of the smallest distribution centers in the country, and we still sort up to one million mailpieces every 24 hours.
As for the tracking chip,I'll say again that I've heard of it, but in this one, single case I don't see how there would be much to fear from it, as it would be utterly impossible for the average postal employee to even utilize the retrieval mechanism on any one piece. Also, if each stamp is chipped, how could personal information ever get there? The USPS doesn't know where and when you will buy your stamps; you just do when you need them. A chip in a stamp could reveal the general area it was purchased, and maybe even the exact machine, but beyond that I don't know how it could be misused.
Hope all this has helped you all understand how the Postal Service does what it does.
|