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- ► Individual ZIP codes (7 P)
This category has only the following subcategory.
1. ZIP Code – ZIP Codes are a system of postal codes used by the United States Postal Service since 1963. The term ZIP, an acronym for Zone Improvement Plan, was chosen to suggest that the travels more efficiently, and therefore more quickly. The basic format consists of five numerical digits, an extended ZIP+4 code, introduced in 1983, includes the five digits of the ZIP Code, a hyphen, and four additional digits that determine a more specific location within a given ZIP Code. The term ZIP Code was originally registered as a servicemark by the U. S. Postal Service, USPS style for ZIP is all caps and the c in code is also capitalized, although style sheets for some publications use sentence case or lowercase. The early history and context of postal codes began with postal district/zone numbers, the United States Post Office Department implemented postal zones for numerous large cities in 1943. For example, Mr. John Smith 3256 Epiphenomenal Avenue Minneapolis 16, by the early 1960s a more organized system was needed, and on July 1,1963, non-mandatory five-digit ZIP Codes were introduced nationwide. Three months later, on October 1,1963, the U. S, an earlier list in June had proposed capitalized abbreviations ranging from two to five letters. The abbreviations have remained unchanged, with one exception, according to the historian of the U. S. Robert Moon, an employee of the post office, is considered the father of the ZIP Code, he submitted his proposal in 1944 while working as a postal inspector. The post office gives credit to Moon only for the first three digits of the ZIP Code, which describe the sectional center facility or sec center, an SCF is a central mail processing facility with those three digits. The SCF sorts mail to all post offices with those first three digits in their ZIP Codes, the mail is sorted according to the final two digits of the ZIP Code and sent to the corresponding post offices in the early morning. Sectional centers do not deliver mail and are not open to the public, Mail picked up at post offices is sent to their own SCF in the afternoon, where the mail is sorted overnight. The United States Post Office used a character, which it called Mr. ZIP. He was often depicted with a such as USE ZIP CODE in the selvage of panes of stamps or on labels contained in, or the covers of. In 1983, the U. S. Postal Service introduced an expanded ZIP Code system that it called ZIP+4, often called plus-four codes, add-on codes, or add ons. But initial attempts to promote use of the new format met with public resistance. For Post Office Boxes, the rule is that each box has its own ZIP+4 code. However, there is no rule, so the ZIP+4 Code must be looked up individually for each box. It is common to use add-on code 9998 for mail addressed to the postmaster,9999 for general delivery, for a unique ZIP Code, the add-on code is typically 0001
2. Mr. ZIP – Wilcoxs design was a child-like sketch of a postman delivering a letter. The figure was used only a few times, then filed away, later, AT&T acquired the design and made it available to the Post Office Department at no cost. Miami-based Post Office Department artist Joe Lawrence retained the face but sharpened the limbs and torso, the new figure, who Lawrence had dubbed Mr. ZIP, was unveiled at a convention of postmasters in October 1962. The Post Office had little difficulty in getting mass mailers to use the ZIP Code as it could make its inclusion a condition for receiving preferential mailing rates and this was particularly true of older mailers. Mr. ZIP was the Post Offices answer to this, apparently intended to teach children to always use the ZIP Code as they got older. His limbs were very thin, almost like those of a stick figure and he was particularly used on posters promoting ZIP Code use. The character was phased out by the late 1970s. He also appeared on non-postally-valid labels inside, or on the cover of, stamp collectors sometimes collect the corner block of four stamps with the part of the selvage bearing Mr. ZIP, these are called ZIP blocks. Mr. ZIP appeared in the selvage of United States stamps until January 1986. The Post Office re-introduced Mr. ZIP to stamps in 2013, celebrating the 50th anniversary of the ZIP Code system
3. POSTNET – POSTNET is a barcode symbology used by the United States Postal Service to assist in directing mail. The ZIP Code or ZIP+4 code is encoded in half- and full-height bars, most often, the delivery point is added, usually being the last two digits of the address or PO box number. The barcode starts and ends with a bar and has a check digit after the ZIP, ZIP+4. The encoding table is shown on the right, each individual digit is represented by a set of five bars, two of which are full bars. The full bars represent on bits in a code in which the places represent, from left to right,7,4,2,1. A6 digit barcode, containing the last 2 digits of the ZIP Code, in the early stages of Postal automated mail processing the B code was used to upgrade mail that had been coded only with a 5-digit A code. This barcode was only found on mail that received a 5-digit barcode on the initial coding by an OCR, a 9 digit barcode, containing the ZIP Code and ZIP+4 Code, referred to as the C code. The 9-digit barcode enabled the sorting of mail to the delivery carrier. An 11 digit barcode, containing the ZIP Code, ZIP+4 Code, and this is usually referred to as the DPBC, or Delivery Point Bar Code. By including delivery point information, it enables the Postal Service to sort mail into delivery point sequence, the POSTNET 11-digit barcode was the predominant postal addressing barcode in use until the Intelligent Mail barcode, was introduced and implemented. The POSTNET barcode was replaced by the Intelligent Mail barcode in the fall of 2009, combining all previous Postal Service barcodes, the check digit is chosen so that the sum of all digits in the bar code is a multiple of 10. Equivalently, the sum is 0. To calculate the check digit, Add up the digits, for example, if a letter is sent to Young America, Minnesota, it might be sent to 55555-1237, which would have the sum of 38. Find the remainder of this number when it is divided by 10 and this is also known as the sum modulo 10. A simple way to combine the two steps is to sum the digits without a tens column at all, but discard all carries, subtract the sum modulo 10 from 10. Continuing with the example,10 −8 =2, the check digit is therefore 2. If calculated correctly, the sum of the ZIP, ZIP+4, or ZIP+4+delivery point digits, continuing with the example above, =40, and 40 mod 10 =0. Note that the Delivery Point is often added after the ZIP+4 and before the digit, in which case the computation of the check digit includes the ZIP+4