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Package tracking or ''package logging'' is the process of localizing shipping containers, mail and parcel post at different points of time during sorting, warehousing, and package delivery to verify their provenance and to predict and aid delivery. Package tracking developed historically because it provided customers information about the route of a package and the anticipated date and time of delivery.〔Mark Esser (Industry Developed Temperature Tracking Device for Packages May Have Climate Metrology Applications ) NIST Beat, June 7, 2011〕 This was important because mail delivery often included multiple carriers in varying environmental circumstances, which made it possible for a mail to get lost.〔Herbert Joyce (The History of the Post Office from Its Establishment Down to 1836 ). London: Richard Bentley & Son, 1893〕〔Alan Holyoake, Alan Great Britain secured delivery of mail 1450-1862. The Great Britain Philatelic Society, 2012〕 ==Identification== Mail tracking is made possible through certified mail and registered mail, additional postal services that require the identity of a piece of mail to be recorded during various points of delivery, so that the sender can obtain a proof of delivery and the receiver can predict the time of delivery.〔 The service is provided for an additional charge〔(Certified mail ) USPS〕〔(Registered mail ) USPS〕 but recently free service has been introduced as the cost of the associated technology has been decreasing.〔Deborah Young ( Post office announces free package tracking ) Staten Island Advance, January 4, 2013〕 Initially, a piece of mail was identified by the sending date and the addresses of the sender and the recipient; later tracking numbers came to be used for identification.〔James A. Mackay, James A. Registered Mail of the British Isles. Dumfries, Scotland: James A. Mackay, 1982〕 Traceability has been improved even further by barcoding: by non-specific 1D linear barcodes and 2D matrix barcodes and specialized augmented postal codes such as Postal Alpha Numeric Encoding Technique (PLANET), Postal Numeric Encoding Technique (POSTNET) and Intelligent Mail barcode, and other electronic product codes (EPC-s). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「package tracking」の詳細全文を読む スポンサード リンク
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