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Autodesk was founded by two young artists from Stanford University, Ivan Sutherland and Gary Wiegert. When they left to form a computer graphics consulting company, the company acquired the assets of a proprietary computer graphic system known as the “Nucolor”.

Autodesk’s first product was a desktop CAD system, now known as AutoCAD, which was introduced in December 1982. They released the first commercial version of the application on the Apple II+ as an application program, and a later version, AutoCAD 1982, was available for MS-DOS.

In 1986, Autodesk released a massively modified version of AutoCAD called AutoCAD R14.5.2, which is widely considered to be the first commercial version of the program. In the early 1990s, AutoCAD was ported to the Macintosh, and further porting began in 1998 and 1999 for Windows and UNIX platforms. AutoCAD R14.5.2 became known as AutoCAD 2000.

On December 1, 1997, Autodesk officially changed the company’s name to Autodesk. AutoCAD X11 was the first commercial version of AutoCAD to support the X11 windowing system.

On April 1, 2014, Autodesk announced that after 49 years of business and 10 years of continuous innovation, Autodesk has launched Autodesk 360, a cloud-based platform to deliver next-generation product creation.

Product timeline

Key dates and releases


Autodesk releases AutoCAD, an application which runs on the Apple II+ with a standard Apple II monitor and input devices.


Autodesk releases the massively modified version of AutoCAD called AutoCAD R14.5.2. The R version number indicates it is a revision of AutoCAD. AutoCAD R14.5.2 is the first AutoCAD to have a 32-bit architecture. It is also the first AutoCAD to support a 64-bit CPU architecture.


Autodesk releases AutoCAD R12 for the Macintosh platform.


Autodesk releases AutoCAD R11 for the Macintosh platform.


Autodesk releases AutoCAD R10 for the Macintosh platform.


Autodesk releases AutoCAD R8 for the Macintosh platform.



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AutoCAD’s programming language is Visual LISP. It is a part of AutoCAD that allows developers to create extension modules for AutoCAD. The code can be written in LISP-1 and LISP-2. LISP-1 was used for earlier versions of AutoCAD. LISP-2 was developed for the newest AutoCAD as well as for AutoCAD LT and LT Drawings. However, it was discontinued for AutoCAD LT 2008 onwards.

See also
Comparison of CAD editors for CAE
List of graphics software
List of CAD editors


External links

AutoCAD’s Official Website
AutoCAD’s Developer Site
Open Architecture Architecture and Construction Community
AutoCAD’s Wikipedia Page

Category:Computer-aided design software
Category:CAESAR system
Category:Computer-aided design software for Windows
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What happened to the rest of the supernova debris?

I remember being told that the outer layers of a supernova get ejected at the speed of light. This would make it travel at a relative speed of $c$. But I remember reading that the lower layers take longer to reach that speed.
So, what happened to the slower moving debris, and what is the average speed of the debris, all together?


The most important factor is the amount of mass ejected per second.
If you’re throwing a coin around in the air and it’s spinning around, the larger the diameter, the more effective the force. The same goes for an expanding ball of gas. This means that the part of the ejecta farthest from the center of mass will take the longest.
The number of ejecta particles is important, but only because the farther out you go, the less likely you are to interact with the earth. At the far edges, the ejecta is being blasted into space and getting further from the star. At the core, things are usually just getting slammed against each other, so it’s important that ejecta comes from several different parts of the star.

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When an electrical connection between devices is to be made or broken, it is customary to provide a connection or “make” or “break” tool, which is generally some form of connector, terminal, or other mechanism for physically joining or separating the connector. The tools are generally placed in a suitable housing and then secured by way of a trigger mechanism. The housing will typically include some mechanism, such as a lock, for locking the tool in its operative position.
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Each of these connectors includes a spring mechanism which is compressed when the cable is engaged with a corresponding receptacle, or plug. The receptacle is electrically connected to another device or component which includes receptacle contacts that correspond to the spring mechanism. The electrical connections are made or broken by the relative movement of the receptacle and the plug. The receptacle

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Lines, shapes, and text are now easier to track and add to your drawings. Easily link or unlink between different objects to produce more accurate drawings. (video: 1:00 min.)

Send your designs in PDF or print form to your colleagues or clients, and receive feedback and changes right away. Includes sending to Adobe InDesign and publishing to PDF, HTML, or Microsoft Word.

Improved X, Y Scale and Z Scale:

Measure and edit distance settings for X, Y, and Z Scale values. (video: 1:33 min.)

Use the cursor to set and edit scale values on objects, as well as lock and unlock the scale to prevent changes during edit mode. (video: 1:28 min.)

Position objects more accurately and precisely by using anchor points, which can be placed anywhere on an object. (video: 1:45 min.)

AutoCAD 2023 requires a 64-bit operating system. Learn more about the latest hardware requirements at and

On the go:

Create, edit, and annotate directly from a mobile device, view web sites, and more. Create dynamic graphics and videos, including inserting one or more layers directly into a drawing or creating web pages that you can share to the cloud or publish directly to a publishing server.

New tools for markups and annotations:

Open and create models in different formats, including 3D models and Visio® models. (video: 1:41 min.)

Share sketches, annotations, and layouts to the cloud, Dropbox, Google Drive, and other platforms. (video: 1:35 min.)

Edit and annotate in real time as you are drawing, making it easier to collaborate and communicate. (video: 1:26 min.)

Take advantage of new features to enhance your productivity, including smart guides and tracking.

New features in 2D AutoCAD:

New features in CAD applications:

Zoom in and out by using the + and – keys. (video: 1:48 min.)

Center the viewport on a model by using the Enter key. (video: 1:38 min.)

Select an object and edit directly using the selection shortcut keys. (video: 1:26 min.)

System Requirements:

You must meet the system requirements for the game as stated below in order to install and play the game. If you believe that you have upgraded your system to meet the system requirements for the game, or have any questions regarding the game’s requirements, please visit the Help section of the website.
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