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・ Bell of Batoche
・ Bell of Cheonheungsa
・ Bell of Chersonesos
・ Bell of Frog Lake
・ Bell of Good Luck
・ Bell of Huesca
・ Bell of King Seongdeok
・ Bell of Purity Temple
・ Bell of Sangwonsa
・ Bell of Yongjusa
・ Bell OH-58 Kiowa
・ Bell Oionus I
・ Bell Centennial Arena
・ Bell Center, Wisconsin
・ Bell CH-146 Griffon
Bell character
・ Bell chord
・ Bell Circles II
・ Bell City
・ Bell City High School (Louisiana)
・ Bell City, Kentucky
・ Bell City, Louisiana
・ Bell City, Missouri
・ Bell code
・ Bell College
・ Bell Common
・ Bell Coulee Shelter
・ Bell County
・ Bell County Expo Center
・ Bell County High School


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Bell character : ウィキペディア英語版
Bell character

A bell code (sometimes bell character) is a device control code originally sent to ring a small electromechanical bell on tickers and other teleprinters and teletypewriters to alert operators at the other end of the line, often of an incoming message. Though tickers punched the bell codes into their tapes,〔(【引用サイトリンク】url=http://chem.ch.huji.ac.il/history/baudot.html )〕 printers generally do not print a character when the bell code is received. Bell codes are usually represented by the label "BEL". They have been used since 1870 (initially in Baudot code).
To maintain backward compatibility, video display terminals (VDTs) that replaced teletypewriters included speakers or buzzers to perform the same function, as did the personal computers that followed. Modern terminal emulators often integrate the warnings to the desktop environment (e.g., the Mac OS X Terminal will play the system warning sound) and also often offer a silent ''visual bell'' feature that flashes the terminal window briefly.
== Representations ==

In ASCII and Unicode the character with the value 7 is BEL. It can be referred to as control-G or ^G in caret notation. Unicode also includes a character for the visual representation of the bell code, "symbol for bell" ((unicode:␇)) at U+2407.
In the 5-bit Baudot codes, BEL is represented by the number 11 (0x0B) when in "figures" mode.
In the C programming language (created in 1972), the bell character can be placed in a string or character constant with \a. ('a' stands for "alert" or "audible" and was chosen because \b was already used for the backspace character.)

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「Bell character」の詳細全文を読む



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