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In May 2018, Autodesk launched AutoCAD 360 for iOS, a free-to-play mobile CAD app.

Learn more about Autodesk’s AutoCAD software and digital solutions in our AutoCAD Tutorial Hub.

AutoCAD is the world’s leading product in 3D design software and has been for almost 40 years. From architectural design to mechanical engineering and engineering, everyone uses Autodesk AutoCAD. From two-dimensional drawings to three-dimensional CAD models, Autodesk AutoCAD can turn designers’ ideas into real things.

Why Use AutoCAD?

Autodesk AutoCAD features

Advantages of using AutoCAD

Download AutoCAD for free

What is AutoCAD?

Autodesk AutoCAD is a 2D and 3D CAD software. AutoCAD is a desktop CAD application, but it’s used for large-scale projects as well.

AutoCAD is designed for professionals in the fields of Architecture, Landscaping, Engineering, and Product Development. If you are designing something like a bathroom, kitchen, or any home product, you should know that AutoCAD is the standard for this field.

You’ll find that most people who make designs use AutoCAD because of its feature-rich design and editing tools.

Top AutoCAD Features

Creating technical drawings

Creating models

Using paper to create 3D designs

Export to video

File formats

Software updates

Graphical user interface (GUI)

Advantages of AutoCAD

3D modeling with Autodesk AutoCAD

2D drafting with AutoCAD

Autodesk AutoCAD has the most amazing features in its software. Using a CAD application is the best way to visualize ideas, but it’s not necessary for everyday use. Here are some of the benefits you can enjoy with Autodesk AutoCAD:

3D modeling

In AutoCAD, you can construct 3D models and you can rotate the model.

You can draw planes and lines to give your model a 3D effect. You can create any shape that you want.

You can use feature-based tools to draw a part

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Options and preferences can be changed, e.g. through the command line or via the options dialog, or via the Options and Settings page, with files with the extension.acx. Options are the most obvious way to customize AutoCAD, but there are several other ways.

File types
AutoCAD also supports many other formats such as:
DWF, DXF and CAD formats with vector content (line, polyline, spline, polygon, arc, ellipse, circle).
DWG and DXF files without content, used for conversion into another format.
DGN (Kirby, CorelDRAW), NURBS (with a limited number of knots) and STL (scalable iso-surface STL files).

AutoCAD R14 also supports the import of proprietary entities, such as the open source DWB (Datenschriftbibliothek), an imported format used in Germany.

See also
List of CAD editors
Comparison of CAD editors for digital geometry processing


External links

Official sites

AutoCAD Community Network

Developer sites

Category:Computer-aided design software
Category:3D computer graphics
Category:Computer-aided design software for Windows
Category:3D graphics software
Category:Industrial design
Category:Professional graphic softwareProton transfer and co-ordinate bonding in the reactivity of borohydride derivatives: spectroscopic evidence for electrostatic catalysis.
The mechanism of the reaction between borohydride derivatives and methylhydrazine, an established experimental system for investigating catalysis of proton transfer, has been studied by rapid-scan kinetic spectroscopy and IR and Raman spectroscopy. Kinetic experiments show that the formation of the corresponding imines is a fast process in the ground state, with an activation energy of 38 kJ mol(-1). At low temperature (78 K), the ionic pair formed by the hydride ion and the imine is weakly associated and the exchange of hydride is hindered. In contrast, the proton exchange step is much more facile at room temperature. The effect of the proton donor ligands on the free energy

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Open Autocad. If the file manager asks whether or not you wish to activate
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The effect of temperature on the permeability of skin: comparison of two measurement techniques.
This study compares two different techniques for measuring the permeability of the skin to ionized calcium and to insulin. Each was applied in a patient with hypercalcemia and in a patient with acute onset of diabetes mellitus. Skin diffusion was calculated from the change in the concentration of calcium in the interstitial fluid compared with the concentration of calcium in the subcutaneous blood vessels. The permeability of the skin to insulin was calculated from the clearance of intravenously administered insulin. No difference in the skin permeability to calcium was demonstrated by either technique. The permeability to insulin was higher in the patient with diabetes.

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XSLT – transform a tree of elements

I’m a starter in XSLT but have a very basic problem.
I have a xml document and in that I have a parent-child list like this:


Now, the document can have more elements and and they are listed inside in a tree.
I need to parse the document and use the elements in the tree and apply different transformations to each of them.

This will transform the B element and its childs but I need to transform B,C,D too.
Any suggestion on how to do this?


Try this:
XSLT 1.0

What’s New In AutoCAD?


Manual import of layer groups from a PDF or any other supported file format, including selection of up to 100 items at once. (video: 3:04 min.)


Easily move and manipulate strokes in either path or object mode for accurate line and object trace and edit. (video: 2:42 min.)


Split and combine multiple paths to create a new, single path. (video: 3:07 min.)


Easily switch between path and object mode in both open and closed extents and open paths, including selection of up to 100 items at once. (video: 3:12 min.)


Draw multiple overlapping and non-overlapping polylines simultaneously. (video: 2:51 min.)


Edit text in lines or objects. (video: 2:10 min.)

Historical Events:

Simplify drawing and reduce the number of layers with detailed history of previous versions. (video: 2:23 min.)

Pan and zoom:

Zoom and pan the entire drawing window to view and edit areas throughout the drawing. (video: 2:43 min.)

Extending Drawings with Interactivity:

Rapidly convert 3D models to 2D and control the object’s display and viewing capabilities. (video: 1:33 min.)

Show and Hide:

Quickly hide or unhide objects while viewing. (video: 1:28 min.)


Control the rewind and play functions on a drawing loop. (video: 1:20 min.)


Draw complex trigonometric formulas by combining the Equation Editor with the Drawing and Layout Toolbars. (video: 3:54 min.)

Graphic Styles:

Create graphic styles from multiple objects and apply them to multiple layers. (video: 1:28 min.)


Modify, duplicate and merge layers with in-line controls. (video: 2:24 min.)


Draw freehand with the Drawing and Layout Toolbars. (video: 1:16 min.)


Create a subset of a single layer to quickly isolate or hide objects

System Requirements:

Windows 7/8/8.1/10 64 bit (7 & 10 required)
1 GHz processor
1024 MB VRAM
400 MB available hard drive space
DirectX 9 graphics card with 512 MB of VRAM
NOTE: Full or HD video streaming does NOT require a premium version of the game.
NOTE: Must have a DirectX 9 graphics card with 512 MB of VRAM
NOTE: Windows XP users may download the software from
NOTE: Must have a DirectX