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A book cipher is a cipher in which each word or letter in the plaintext of a message is replaced by some code that locates it in another text, the key . A simple version of such a cipher would use a specific book as the key, and would replace each word of the plaintext by a number that gives the position where that word occurs in that book.
The International Standard Book Number (ISBN) is a numeric commercial book identifier that is intended to be unique. [a] [b] Publishers purchase or receive ISBNs from an affiliate of the International ISBN Agency. [2] A different ISBN is assigned to each separate edition and variation of a publication, but not to a simple reprinting of an ...
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Text messaging, or texting, is the act of composing and sending electronic messages, typically consisting of alphabetic and numeric characters, between two or more users of mobile phones, desktops / laptops, or another type of compatible computer. Text messages may be sent over a cellular network or may also be sent via satellite or Internet ...
For years, the iPhone’s two-tiered texting system has been a hot topic. iPhone-to-iPhone texts in the Messages app are blue, and enjoy full encryption and more robust media features, like ...
A common format for biblical citations is Book chapter:verses, using a colon to delimit chapter from verse, as in: "In the beginning, God created the heaven and the earth" ( Gen. 1:1 ). Or, stated more formally, [ 2][ 3][ 4][ a] book chapter:verse1,verse2 for multiple disjoint verses ( John 6:14, 44 ). The range delimiter is an en-dash, and ...
Shelfmark. A shelfmark is a mark in a book or manuscript that denotes the cupboard or bookcase where it is kept as well as the shelf and possibly even its location on the shelf. The closely related term pressmark (from press, meaning cupboard) denotes only the cupboard or case. It is distinct from a call number, which is the code under which a ...
Textbook. Textbooks written in Pashto distributed to Afghan school children. A textbook is a book containing a comprehensive compilation of content in a branch of study with the intention of explaining it. Textbooks are produced to meet the needs of educators, usually at educational institutions.