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  2. Magic number (programming) - Wikipedia

    en.wikipedia.org/wiki/Magic_number_(programming)

    Microsoft Compound File Binary Format (mostly known as one of the older formats of Microsoft Office documents) files start with D0 CF 11 E0, which is visually suggestive of the word "DOCFILE0". Headers in ZIP files often show up in text editors as "PK♥♦" ( 50 4B 03 04 ), where "PK" are the initials of Phil Katz , author of DOS compression ...

  3. Python syntax and semantics - Wikipedia

    en.wikipedia.org/wiki/Python_syntax_and_semantics

    Python sets are very much like mathematical sets, and support operations like set intersection and union. Python also features a frozenset class for immutable sets, see Collection types. Dictionaries (class dict) are mutable mappings tying keys and corresponding values. Python has special syntax to create dictionaries ({key: value})

  4. Object file - Wikipedia

    en.wikipedia.org/wiki/Object_file

    The file contains no relocation or linkage information. These files can be loaded into read/write memory, or stored in read-only memory. For example, the Motorola 6800 MIKBUG monitor contains a routine to read an absolute object file (SREC Format) from paper tape. [5] DOS COM files are a more recent example of absolute object files. [6]

  5. File format - Wikipedia

    en.wikipedia.org/wiki/File_format

    The type code specifies the format of the file, while the creator code specifies the default program to open it with when double-clicked by the user. For example, the user could have several text files all with the type code of TEXT, but each open in a different program, due to having differing creator codes.

  6. List of file formats - Wikipedia

    en.wikipedia.org/wiki/List_of_file_formats

    .metalink, .met – Metalink A format to list metadata about downloads, such as mirrors, checksums, and other information. MHTML – Mime HTML (Hyper-Text Markup Language) code file.ps – PS A XML-based serialization for test automation scripts called PowerScripts for K2 based applications..rss, .xml – RSS Syndication format.

  7. Executable and Linkable Format - Wikipedia

    en.wikipedia.org/wiki/Executable_and_Linkable_Format

    An ELF file has two views: the program header shows the segments used at run time, whereas the section header lists the set of sections.. In computing, the Executable and Linkable Format [2] (ELF, formerly named Extensible Linking Format) is a common standard file format for executable files, object code, shared libraries, and core dumps.

  8. Data Matrix - Wikipedia

    en.wikipedia.org/wiki/Data_Matrix

    A Data Matrix on a Mini PCI card, encoding the serial number 15C06E115AZC72983004. The most popular application for Data Matrix is marking small items, due to the code's ability to encode fifty characters in a symbol that is readable at 2 or 3 mm 2 (0.003 or 0.005 sq in) and the fact that the code can be read with only a 20% contrast ratio. [1]

  9. Program optimization - Wikipedia

    en.wikipedia.org/wiki/Program_optimization

    In computer science, program optimization, code optimization, or software optimization is the process of modifying a software system to make some aspect of it work more efficiently or use fewer resources. [1]