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  2. Usage share of operating systems - Wikipedia

    en.wikipedia.org/wiki/Usage_share_of_operating...

    It eventually reached 79.79% on 5 October 2021, the same day on which its successor Windows 11 was released. In the United States, usage of Windows XP has dropped to 0.38% (of all Windows versions), and its global average to 0.59%, while in Africa it is still at 2.71%, and in Armenia it is more than 70%, as of 2017. [98]

  3. Hard disk drive failure - Wikipedia

    en.wikipedia.org/wiki/Hard_disk_drive_failure

    A hard disk drive failure occurs when a hard disk drive malfunctions and the stored information cannot be accessed with a properly configured computer. A hard disk failure may occur in the course of normal operation, or due to an external factor such as exposure to fire or water or high magnetic fields , or suffering a sharp impact or ...

  4. Operating system - Wikipedia

    en.wikipedia.org/wiki/Operating_system

    In order to ensure that one program cannot monopolize the computer's limited hardware resources, the operating system gives each application a share of the resource, either in time (CPU) or space (memory). [10] [11] The operating system also must isolate applications from each other to protect them from errors and security vulnerabilities in ...

  5. High availability - Wikipedia

    en.wikipedia.org/wiki/High_availability

    For example, electricity that is delivered without interruptions (blackouts, brownouts or surges) 99.999% of the time would have 5 nines reliability, or class five. [10] In particular, the term is used in connection with mainframes [ 11 ] [ 12 ] or enterprise computing, often as part of a service-level agreement .

  6. Peer-to-peer - Wikipedia

    en.wikipedia.org/wiki/Peer-to-peer

    Microsoft, in Windows 10, uses a proprietary peer-to-peer technology called "Delivery Optimization" to deploy operating system updates using end-users' PCs either on the local network or other PCs. According to Microsoft's Channel 9, this led to a 30%-50% reduction in Internet bandwidth usage. [ 59 ]

  7. Cyclic redundancy check - Wikipedia

    en.wikipedia.org/wiki/Cyclic_redundancy_check

    00000000001110 100 1011 00000000000101 100 101 1 ----- 00000000000000 000 <--- remainder The following Python code outlines a function which will return the initial CRC remainder for a chosen input and polynomial, with either 1 or 0 as the initial padding.

  8. Percentage - Wikipedia

    en.wikipedia.org/wiki/Percentage

    Due to inconsistent usage, it is not always clear from the context what a percentage is relative to. When speaking of a "10% rise" or a "10% fall" in a quantity, the usual interpretation is that this is relative to the initial value of that quantity. For example, if an item is initially priced at $200 and the price rises 10% (an increase of $20 ...

  9. Power supply unit (computer) - Wikipedia

    en.wikipedia.org/wiki/Power_supply_unit_(computer)

    [16] [17] For a comparison, a 500-watt power supply carrying the 80 Plus Bronze efficiency rating (which means that such a power supply is designed to be at least 82% efficient for loads above 100 W) may provide an 84% efficiency for a 100 W load, wasting only 19 W. [18] Other ratings such as 80 plus gold, 80 plus platinum and 80 plus titanium ...