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  2. List of Microsoft Windows versions - Wikipedia

    en.wikipedia.org/wiki/List_of_Microsoft_Windows...

    Windows Mobile 6.1: April 1, 2008 CE 5.2 Windows Mobile 6.1.4: 6 on 6 November 11, 2008 [8] Windows Mobile 6.5: Titanium May 11, 2009 CE 6.0 Windows Phone 7 [j] Metro ARMv7: October 29, 2010 Windows Phone 7.5: Mango: September 27, 2011 Windows Phone 7.8: Tango: February 1, 2013 Windows Phone 8: Apollo October 29, 2012 NT 6.2 Windows Phone 8.1 ...

  3. Comparison of Microsoft Windows versions - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_Microsoft...

    If an independent installation of both, DOS and Windows is desired, DOS ought to be installed prior to Windows, at the start of a small partition. The system must be transferred by the (dangerous) "SYSTEM" DOS-command, while the other files constituting DOS can simply be copied (the files located in the DOS-root and the entire COMMAND directory).

  4. Conventional memory - Wikipedia

    en.wikipedia.org/wiki/Conventional_memory

    Memory areas of the IBM PC family In DOS memory management , conventional memory , also called base memory , is the first 640 kilobytes of the memory on IBM PC or compatible systems. It is the read-write memory directly addressable by the processor for use by the operating system and application programs.

  5. Memory management - Wikipedia

    en.wikipedia.org/wiki/Memory_management

    Memory management (also dynamic memory management, dynamic storage allocation, or dynamic memory allocation) is a form of resource management applied to computer memory.The essential requirement of memory management is to provide ways to dynamically allocate portions of memory to programs at their request, and free it for reuse when no longer needed.

  6. Memory hierarchy - Wikipedia

    en.wikipedia.org/wiki/Memory_hierarchy

    Since response time, complexity, and capacity are related, the levels may also be distinguished by their performance and controlling technologies. [1] Memory hierarchy affects performance in computer architectural design, algorithm predictions, and lower level programming constructs involving locality of reference .

  7. DDR SDRAM - Wikipedia

    en.wikipedia.org/wiki/DDR_SDRAM

    Modules are instead designed to run at different clock frequencies: for example, a PC-1600 module is designed to run at 100 MHz, and a PC-2100 is designed to run at 133 MHz. A module's clock speed designates the data rate at which it is guaranteed to perform, hence it is guaranteed to run at lower ( underclocking ) and can possibly run at ...

  8. Windows Mobile 6.1 - Wikipedia

    en.wikipedia.org/wiki/Windows_Mobile_6.1

    Windows Mobile 6.1 is a version of the Windows Mobile operating system, released on April 1, 2008. It was based on Windows Vista.It is a minor upgrade to the Windows Mobile 6 platform with various performance enhancements and a redesigned Home screen featuring horizontal tiles that expand on clicking to display more information, although this new home screen is featured only on Windows Mobile ...

  9. Hard disk drive performance characteristics - Wikipedia

    en.wikipedia.org/wiki/Hard_disk_drive...

    The first HDD [11] had an average seek time of about 600 ms. [12] and by the middle 1970s, HDDs were available with seek times of about 25 ms. [13]Some early PC drives used a stepper motor to move the heads, and as a result had seek times as slow as 80–120 ms, but this was quickly improved by voice coil type actuation in the 1980s, reducing seek times to around 20 ms.