View source for Multiline optical-character reader

{{Short description|Type of mail sorting machine}}
A '''multiline optical-character reader''', or MLOCR, is a type of mail sorting machine that uses [[Optical character recognition|optical character recognition]] (OCR) technology to determine how to route mail through the postal system.

MLOCRs work by capturing images of the front of letter-sized mailpieces, and extracting the entire address from each piece. It looks up the postal code within each address in a master database, prints a [[Barcode|barcode]] representing this information on the mailpiece, and performs an initial sort.<ref>{{cite news|url=https://news.google.com/newspapers?nid=1901&dat=19920912&id=kIgfAAAAIBAJ&pg=1970,5531361|title=The mail must get through|newspaper=The New Volusian|date=September 12, 1992|first=Dinah|last=Pulver}}</ref><ref>{{cite news|url=https://news.google.com/newspapers?nid=2199&dat=19900829&id=Zi4yAAAAIBAJ&pg=6948,4965597|title=Postal Service hoping for a white (envelope) Christmas|publisher=Associated Press|date=August 29, 1990}}</ref> All of this occurs in a fraction of a second as the mailpiece passes through the machine. After this point, mail is further sorted by barcode sorters that read this barcode to determine its destination throughout its journey all the way down to the walk sequence of the mail carrier.

If the MLOCR is not able to decode the address (usually due to being handwritten,{{Citation needed|date=September 2007}}) it puts the mailpiece on "hold" by putting a unique fluorescent barcode on the back of the mailpiece, and these un-coded letters are set aside while the Remote Bar Coding System (formerly called Remote Video Encoding) scrutinizes these. An image of the mailpiece is sent to a Remote Encoding Center where human Data Conversion Operators process the images. These operators convert the information on the mailpiece into abbreviated codes and enter the data into the computer. This data is sent back to the MLOCR site where it is matched with the unique barcodes on the back of the un-coded mailpieces, and these pieces finally are given barcodes like the rest of the mail. All this effort is put into deciphering these mailpieces so that they never need to be examined again.

The United States Postal Service is the largest user of these machines{{Citation needed|date=May 2008}}; however, large volume mailers and mail consolidators also have their own MLOCR systems to barcode outgoing mail, in order to receive significant postage discounts.

An option called ''FASTforward''[http://www.usps.com/ncsc/addressservices/moveupdate/fastforward.htm] can be added to an MLOCR that allows it to automatically forward mail to a new address.{{Update inline|date=August 2017|reason=FASTforward retired since January 2013, replaced with NCOALink.}} This additional computer hardware/software combination looks up decoded addresses in the National Change of Address database to see if the recipient has recently moved. If so, a [[POSTNET]] barcode representing the new address is sprayed on the mailpiece thus routing it to new address although the old address is still visible—a testament to the degree at which mail can be mechanically sorted.

Generally all OCR equipped letter sorting machines ordered since the late 1980s have been equipped with OCR systems capable of reading multiple lines of address.

==References==
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==External links==
*[http://www.teterboro-online.com/news/news03/usps/usps.shtml Mail Factory Migrates To Teterboro ]
[[Category:Optical character recognition]]

{{Sourceattribution|Multiline optical-character reader}}