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  2. AutoCAD version history - Wikipedia

    en.wikipedia.org/wiki/AutoCAD_version_history

    DWG 2010 file format introduced. Parametrics introduced. Mesh 3D solid modeling was introduced. PDF underlays. Both 32-bit and 64-bit versions of AutoCAD 2010 and AutoCAD LT 2010 are compatible with and supported under Microsoft Windows 7. 2011 18.1 March 25, 2010 25 Surface modeling, surface analysis, and object transparency introduced.

  3. AutoCAD - Wikipedia

    en.wikipedia.org/wiki/AutoCAD

    A man using AutoCAD 2.6 to digitize a drawing of a school building. AutoCAD was derived from a program that began in 1977, and then released in 1979 [5] called Interact CAD, [6] [7] [8] also referred to in early Autodesk documents as MicroCAD, which was written prior to Autodesk's (then Marinchip Software Partners) formation by Autodesk cofounder Michael Riddle.

  4. ObjectARX - Wikipedia

    en.wikipedia.org/wiki/ObjectARX

    ObjectARX (AutoCAD Runtime eXtension) is an API for customizing and extending AutoCAD. The ObjectARX SDK is published by Autodesk and freely available under license from Autodesk. [ 1 ] The ObjectARX SDK consists primarily of C++ headers and libraries that can be used to build Windows DLLs that can be loaded into the AutoCAD process and ...

  5. Extension cord - Wikipedia

    en.wikipedia.org/wiki/Extension_cord

    Yellow NEMA 5-15 extension cord NEMA-1 extension cord, common in the United States Extension cord reel (Germany). An extension cord (US), extension cable, power extender, drop cord, or extension lead (UK) is a length of flexible electrical power cable (flex) with a plug on one end and one or more sockets on the other end (usually of the same type as the plug).

  6. Power cable - Wikipedia

    en.wikipedia.org/wiki/Power_cable

    A power cable is an electrical cable, an assembly of one or more electrical conductors, usually held together with an overall sheath. The assembly is used for transmission of electrical power . Power cables may be installed as permanent wiring within buildings, buried in the ground, run overhead, or exposed.

  7. Electrical length - Wikipedia

    en.wikipedia.org/wiki/Electrical_length

    The phase velocity at which electrical signals travel along a transmission line or other cable depends on the construction of the line. Therefore, the wavelength corresponding to a given frequency varies in different types of lines, thus at a given frequency different conductors of the same physical length can have different electrical lengths.

  8. Power systems CAD - Wikipedia

    en.wikipedia.org/wiki/Power_systems_CAD

    Power systems CAD software products allow organizations to develop power systems designs, with faster turnaround time, than with previous manual methods. Aids to electrical calculation started with DC network calculating boards and AC network analyzers, which reached a high degree of development by the middle of the 20th century. Large scale ...

  9. Physical Address Extension - Wikipedia

    en.wikipedia.org/wiki/Physical_Address_Extension

    Windows XP SP2 and later, by default, on processors with the no-execute (NX) or execute-disable (XD) feature, runs in PAE mode in order to allow NX. [20] The NX bit resides in bit 63 of the page table entry and, without PAE, page table entries on 32-bit systems have only 32 bits; therefore PAE mode is required in order to exploit the NX feature.