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  2. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    Data stored in version 5 of the Hierarchical Data Format. C9: É: 0 com CP/M 3 and higher with overlays [26] CA FE BA BE: Êþº¾: 0 class Java class file, Mach-O Fat Binary: EF BB BF:  0 txt others: UTF-8 byte order mark, commonly seen in text files. [27] [28] [29] FF FE: ÿþ: 0 txt others: UTF-16LE byte order mark, commonly seen in ...

  3. robots.txt - Wikipedia

    en.wikipedia.org/wiki/Robots.txt

    robots.txt is the filename used for implementing the Robots Exclusion Protocol, a standard used by websites to indicate to visiting web crawlers and other web robots which portions of the website they are allowed to visit. The standard, developed in 1994, relies on voluntary compliance. Malicious bots can use the file as a directory of which ...

  4. EICAR test file - Wikipedia

    en.wikipedia.org/wiki/EICAR_test_file

    The file is a text file of between 68 and 128 bytes [6] that is a legitimate .com executable file (plain x86 machine code) that can be run by MS-DOS, some work-alikes, and its successors OS/2 and Windows (except for 64-bit due to 16-bit limitations). The EICAR test file will print "EICAR-STANDARD-ANTIVIRUS-TEST-FILE!"

  5. List of FTP server return codes - Wikipedia

    en.wikipedia.org/.../List_of_FTP_server_return_codes

    List of FTP server return codes. FTP server return codes always have three digits, and each digit has a special meaning. [1] The first digit denotes whether the response is good, bad or incomplete: Range. Purpose. 1xx. Positive Preliminary reply. The requested action is being initiated; expect another reply before proceeding with a new command.

  6. Text file - Wikipedia

    en.wikipedia.org/wiki/Text_file

    A text file (sometimes spelled textfile; an old alternative name is flatfile) is a kind of computer file that is structured as a sequence of lines of electronic text. A text file exists stored as data within a computer file system. In operating systems such as CP/M, where the operating system does not keep track of the file size in bytes, the ...

  7. UTF-8 - Wikipedia

    en.wikipedia.org/wiki/UTF-8

    v. t. e. UTF-8 is a character encoding standard used for electronic communication. Defined by the Unicode Standard, the name is derived from Unicode Transformation Format – 8-bit. [1] UTF-8 is capable of encoding all 1,112,064 [2] valid Unicode code points using a variable-width encoding of one to four one- byte (8-bit) code units.

  8. ASCII - Wikipedia

    en.wikipedia.org/wiki/ASCII

    ASCII (/ ˈæskiː / ⓘ 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 devices.

  9. Unicode - Wikipedia

    en.wikipedia.org/wiki/Unicode

    Unicode, formally The Unicode Standard, [note 1] is a text encoding standard maintained by the Unicode Consortium designed to support the use of text in all of the world's writing systems that can be digitized. Version 16.0 of the standard [A] defines 154 998 characters and 168 scripts [3] used in various ordinary, literary, academic, and ...