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  2. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    PDF 2.0 defines 256-bit AES encryption as the standard for PDF 2.0 files. The PDF Reference also defines ways that third parties can define their own encryption systems for PDF. PDF files may be digitally signed, to provide secure authentication; complete details on implementing digital signatures in PDF are provided in ISO 32000-2.

  3. Process (computing) - Wikipedia

    en.wikipedia.org/wiki/Process_(computing)

    The process state is changed back to "waiting" when the process no longer needs to wait (in a blocked state). Once the process finishes execution, or is terminated by the operating system, it is no longer needed. The process is removed instantly or is moved to the "terminated" state. When removed, it just waits to be removed from main memory ...

  4. Glossary of computer science - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_computer_science

    Also simply application or app. Computer software designed to perform a group of coordinated functions, tasks, or activities for the benefit of the user. Common examples of applications include word processors, spreadsheets, accounting applications, web browsers, media players, aeronautical flight simulators, console games, and photo editors. This contrasts with system software, which is ...

  5. Data-flow diagram - Wikipedia

    en.wikipedia.org/wiki/Data-flow_diagram

    Process. The process (function, transformation) is part of a system that transforms inputs to outputs. The symbol of a process is a circle, an oval, a rectangle or a rectangle with rounded corners (according to the type of notation). The process is named in one word, a short sentence, or a phrase that is clearly to express its essence. [7] Data ...

  6. List of computing and IT abbreviations - Wikipedia

    en.wikipedia.org/wiki/List_of_computing_and_IT...

    PCMCIA—Personal Computer Memory Card International Association; PCM—Pulse-Code Modulation; PCRE—Perl Compatible Regular Expressions; PD—Public Domain; PDA—Personal Digital Assistant; PDF—Portable Document Format; PDH—Plesiochronous Digital Hierarchy; PDP—Programmed Data Processor; PE—Physical Extents; PE—Portable Executable

  7. Glossary of computer hardware terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_computer...

    The process of keeping data in multiple caches synchronised in a multiprocessor shared memory system, also required when DMA modifies the underlying memory. cache eviction Freeing up data from within a cache to make room for new cache entries to be allocated; controlled by a cache replacement policy. Caused by a cache miss whilst a cache is ...

  8. Process management (computing) - Wikipedia

    en.wikipedia.org/wiki/Process_management_(computing)

    The send function serves the same purpose as the trap; that is, it carefully checks the message, switches the processor to kernel mode, and then delivers the message to a process that implements the target functions. Meanwhile, the user process waits for the result of the service request with a message receive operation.

  9. Task (computing) - Wikipedia

    en.wikipedia.org/wiki/Task_(computing)

    IBM's use of the term has been influential, though underlining the ambiguity of the term, in IBM terminology, "task" has dozens of specific meanings, including: [4] A unit of work representing one of the steps in a process. A unit of work to be accomplished by a device or process. A process and the procedures that run the process.