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Code 39 (also known as Alpha39, Code 3 of 9, Code 3/9, Type 39, USS Code 39, or USD-3) is a variable length, discrete barcode symbology defined in ISO/IEC 16388:2007. The Code 39 specification defines 43 characters, consisting of uppercase letters (A through Z), numeric digits (0 through 9) and a number of special characters ...
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ASCII (/ ˈ æ s k iː / ⓘ ASS-kee), [3]: 6 an acronym for American Standard Code for Information Interchange, is a character encoding standard for electronic communication. . ASCII codes represent text in computers, telecommunications equipment, and other devic
A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference uses the format &#nnnn; or &#xhhhh; where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form.
The majority of code pages in current use are supersets of ASCII, a 7-bit code representing 128 control codes and printable characters. In the distant past, 8-bit implementations of the ASCII code set the top bit to zero or used it as a parity bit in network data transmissions. When the top bit was made available for representing character data ...
ASCII Code (DEC) ASCII Code (HEX) Latin capital letters: A,B, ... Z: 65 - 90 41 - 5A Latin small letters: a,b, ... z: 97 - 122 61 - 7A Numbers: 0,1, ... 9: 48 - 57 30 - 39 SPACE (space) 32 20 APOSTROPHE ' 39 27 LEFT PARENTHESIS (40 28 RIGHT PARENTHESIS) 41 29 PLUS SIGN + 43 2B COMMA, 44 2C HYPHEN-MINUS-45 2D FULL STOP. 46 2E SOLIDUS / 47 2F ...
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