^{In Uruguay, most house numbering starts at a high number among the hundreds or the thousands. The system is similar to the French-Spanish one: when a house is divided the term 'bis' is added with the difference that no single term designates the third: when a house is divided or added between another the term 'bis' is repeated as many divisions have been made or houses added in between, for example '3217 bis bis' corresponds to the third house from the 3217th, and so on, when many houses are merged the lowest number is used, leaving the in-between numbers missing.[19] Also there are cases when no number is assigned, this occurs mostly in peripheral areas inside the cities, low house numbering occurs in small locations and in balneary areas houses are designated by name rather than number. }

*Only the term "ISBN" should be used; the terms "eISBN" and "e-ISBN" have historically been sources of confusion and should be avoided. If a book exists in one or more digital (e-book) formats, each of those formats must have its own ISBN. In other words, each of the three separate EPUB, Amazon Kindle, and PDF formats of a particular book will have its own specific ISBN. They should not share the ISBN of the paper version, and there is no generic "eISBN" which encompasses all the e-book formats for a title.[46]*

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The ISBN can be translated into a worldwide compatible bar code format. Publishers who wish to have their ISBNs translated into worldwide compatible bar codes can now make their request directly online at www.isbn.org or www.bowkerbarcode.com . Bar code scanning is a required step required by for many retailers in the sales transaction process for book publications and book-related items. We hope that offering this service will save you time and enable you to meet all of your transaction partners' requirements.

*a concept of quantity that is or can be derived from a single unit, the sum of a collection of units, or zero. Every number occupies a unique position in a sequence, enabling it to be used in counting. It can be assigned to one or more sets that can be arranged in a hierarchical classification: every number is a complex number; a complex number is either an imaginary number or a real number, and the latter can be a rational number or an irrational number; a rational number is either an integer or a fraction, while an irrational number can be a transcendental number or an algebraic numberSee complex number, imaginary number, real number, rational number, irrational number, integer, fraction, transcendental number, algebraic number See also cardinal number, ordinal number*