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2. Product activation - Wikipedia

   en.wikipedia.org/wiki/Product_activation

   Product activation is a license validation procedure required by some proprietary software programs. Product activation prevents unlimited free use of copied or replicated software. Unactivated software refuses to fully function until it determines whether it is authorized to fully function. Activation allows the software to stop blocking its use.

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. Autodesk - Wikipedia

   en.wikipedia.org/wiki/Autodesk

   Autodesk, Inc. is an American multinational software corporation that provides software products and services for the architecture, engineering, construction, manufacturing, media, education, and entertainment industries.

5. Product key - Wikipedia

   en.wikipedia.org/wiki/Product_key

   Product key on a Proof of License Certificate of Authenticity for Windows Vista Home Premium. A product key, also known as a software key, serial key or activation key, is a specific software-based key for a computer program. It certifies that the copy of the program is original. Product keys consist of a series of numbers and/or letters.

6. AutoCAD version history - Wikipedia

   en.wikipedia.org/wiki/AutoCAD_version_history

   AutoCAD is a commercial computer-aided design (CAD) and drafting software application by Autodesk. The first release of the software started with version 1.0 in December 1982. [ 1 ] The software has been continuously updated since its initial release.

7. Software license - Wikipedia

   en.wikipedia.org/wiki/Software_license

   On both sides, and therefore mostly orthogonal, "free download" . A software license is a legal instrument governing the use or redistribution of software. Since the 1970s, software copyright has been recognized in the United States. Despite the copyright being recognized, most companies prefer to sell licenses rather than copies of the ...