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  2. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    A PDF file is organized using ASCII characters, except for certain elements that may have binary content. The file starts with a header containing a magic number (as a readable string) and the version of the format, for example %PDF-1.7. The format is a subset of a COS ("Carousel" Object Structure) format. [23]

  3. Computer network - Wikipedia

    en.wikipedia.org/wiki/Computer_network

    A personal area network (PAN) is a computer network used for communication among computers and different information technological devices close to one person. Some examples of devices that are used in a PAN are personal computers, printers, fax machines, telephones, PDAs, scanners, and video game consoles.

  4. Network File System - Wikipedia

    en.wikipedia.org/wiki/Network_File_System

    Network File System ( NFS) is a distributed file system protocol originally developed by Sun Microsystems (Sun) in 1984, [ 1] allowing a user on a client computer to access files over a computer network much like local storage is accessed. NFS, like many other protocols, builds on the Open Network Computing Remote Procedure Call (ONC RPC) system.

  5. Network-attached storage - Wikipedia

    en.wikipedia.org/wiki/Network-attached_storage

    Network-attached storage. A 5-bay NAS server. Network-attached storage ( NAS) is a file-level (as opposed to block-level storage) computer data storage server connected to a computer network providing data access to a heterogeneous group of clients. The term "NAS" can refer to both the technology and systems involved, or a specialized device ...

  6. Networking hardware - Wikipedia

    en.wikipedia.org/wiki/Networking_hardware

    Networking hardware, also known as network equipment or computer networking devices, are electronic devices that are required for communication and interaction between devices on a computer network. Specifically, they mediate data transmission in a computer network. [ 1] Units which are the last receiver or generate data are called hosts, end ...

  7. Machine-readable document - Wikipedia

    en.wikipedia.org/wiki/Machine-readable_document

    Machine-readable document. A machine-readable document is a document whose content can be readily processed by computers. Such documents are distinguished from more general machine-readable data by virtue of having further structure to provide the necessary context to support the business processes for which they are created.

  8. Computer file - Wikipedia

    en.wikipedia.org/wiki/Computer_file

    Computer file. In computing, a computer file is a resource for recording data on a computer storage device, primarily identified by its filename. Just as words can be written on paper, so too can data be written to a computer file. Files can be shared with and transferred between computers and mobile devices via removable media, networks, or ...

  9. Physical layer - Wikipedia

    en.wikipedia.org/wiki/Physical_layer

    Data link layer. 1. Physical layer. In the seven-layer OSI model of computer networking, the physical layer or layer 1 is the first and lowest layer: the layer most closely associated with the physical connection between devices. The physical layer provides an electrical, mechanical, and procedural interface to the transmission medium.