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The early popularity of AutoCAD was due in large part to its ease of use compared to competing CAD programs (such as CAD systems from companies like Unigraphics and Solidworks), which were more difficult to learn. AutoCAD was a success, and was used by hundreds of thousands of businesses throughout the world. AutoCAD’s success led to other products and services, including a commercial illustrator, rendering engine and geographic information system (GIS) solutions. AutoCAD for Mac OS X was first launched in 2004.

AutoCAD is a standalone software product, but since 1999 has also been a component of the Autodesk Architecture Design Suite, which includes other Autodesk products such as Civil 3D, Revit, and Inventor.

While AutoCAD was not the first standalone CAD system, it was the first to have mass appeal and thus become a major commercial success. The phrase “AutoCAD” was trademarked in June 1983.

The licensing structure for AutoCAD has changed several times. In the late 1980s and early 1990s, Autodesk had a buy-one-get-one-free promotion. Autodesk later offered a package of AutoCAD, Inventor and Civil that could be licensed for a single price for a single product.

History AutoCAD was first released as a desktop app running on microcomputers with internal graphics controllers. The first program was called Revise (later renamed Revit), but by late 1982 the name had changed to CAD. In December 1982, Autodesk released the first version of CAD to the public, CAD Release 0.1. Throughout the late 1980s, Autodesk hired a number of employees to work on CAD. Many of these people were former members of companies like Unigraphics and General Electric. The first features that were added to CAD included the ability to modify blocks. Many new features were also added, such as an area tool and modeling tools for block editing, flexible rectangular drawing area, extensible views, AutoCAD plug-ins, feature-based layer editing, annotation tool, and many more. AutoCAD 2 was released in April 1987 and it was at this point that Autodesk made CAD a subscription product. This meant that CAD was available only by subscription and not on a yearly basis. A new version of the product was released on a yearly basis, called CAD Release 2.0. Autodesk added many

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.NET was added in the form of a COM interface, called xAPI, starting with AutoCAD 2019. Autodesk released OpenAPI 4.0 on August 1, 2019, with the ability to create a C++ SDK library, and introduced a subscription licensing model for the API.

In 2019, Autodesk released the Autodesk Architectural Desktop, which is a cloud based platform designed for architecture, engineering and building projects. AutoCAD and AutoCAD LT is available free of charge until 2021, when it will be available for a subscription price (with the ability to pay for the entire subscription or monthly). The Architectural Desktop includes additional features that allow users to integrate into the project like maps and drawings.


The five standard CAD modes for AutoCAD (the other two being Print and Web) are as follows:

Graphical display of 2D drawing objects.
Object-based toolbars, palettes, and menus
Full 2D drawing support (including 2D polylines and circles)

2D Drafting
Print and plot of drawing views
Coordinate system and viewing tools
Edit mode for objects

3D Drafting
Print and plot of drawing views
Integrated 3D modeling tools
Edit mode for objects and surfaces

2D Drafting and 3D Drafting were added in version 10, while Object-based toolbars and palettes were added in AutoCAD 2000.

Edit drawing objects from a project tree.
Coordinate system and viewing tools
File management tools

Print a drawing.

View drawing views.

The web browser view is also available in AutoCAD LT. It is similar to the 2D Drafting view, except that it can only be used with interactive web pages that have the adim class.

AutoCAD LT also allows the user to open and edit HTML files on the local drive instead of a website.

AutoCAD 2020 added a new “Show planning” display mode, which “Shows lines on paper automatically at all times, so you can view the planned drawing in 3D at any time.”


A merge tool is used in Edit mode.

Merge is used to join objects into one or more contiguous objects. This command can be used to join multiple objects.
Trim is used to cut away or remove parts of objects.
Unite can

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Go to Start menu and click on Autodesk.
Click on Autocad 2010.
Click on Install.

Double click on Autocad 2010.exe and follow the instructions.
Click on OK.
Click on Yes.
Click on Exit.

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Understanding boolean arithmetic

It seems like there is a whole lot of space for misunderstanding in the logical arithmetic of boolean expressions and I have trouble understanding how some of the logical operators actually work.
As an example consider this expression:
a || b && c
a && b || c

Which one of them is more logical?
Is it possible for the operator to be applied in reverse order?


I would say they are both equally valid, i.e. the order does not matter. You could think about it as follows:

If you start with a non-zero expression (i.e. either a or b or c is non-zero), then a || b && c evaluates to true.
If you start with zero expression (i.e. all three are zero), then a && b || c evaluates to true.

For details, please refer to truth table.


Any order is perfectly valid (assuming there are no spurious unused outputs), e.g.
a && b && c

Can be converted to
b && a && c

But any combination is not necessarily the same. For example,
(a && b && c) || (d && e && f)

is equivalent to
((a && b && c) || (d && e && f)) && 0

What’s New in the AutoCAD?

Achieve work group consensus in seconds. Facilitate change requests and feedback by letting people take part and contribute to your designs directly from AutoCAD. (video: 3:22 min.)

A new unified framework for drawing

Spatial-based drawing. Offload long tasks and achieve faster results by specifying the geometric layout of your design. With Spatial-based drawing, you no longer need to draw separate splines, arcs, and circles, like before. Instead, you can build your drawing around the geometric relationships of your shapes, like a photo, and share your drawing easily.

Sliced design. Better route optimization. Switch from curving to slicing to calculate the best route for your design. Plus, find the best slicing style for any shape, and zoom into the drawing and view your design the way you want it.

Instant shaping. Create a closed shape, such as a circle, just by dragging a line from any point to any other.

Project design. Preview 3D or 2D designs for your project. Make adjustments to any view, move or rotate, and draw your own view.

Seamless interactions. A more fluid and intuitive interface. Improved sketchpad view, contextual ribbon, and other features.

New features in AutoCAD Apprenticeship

AutoCAD Apprenticeship is a comprehensive way to build skills, track progress, and get certified in AutoCAD.

Work with designers and engineers

Get a job as an AutoCAD apprentice and earn the CAD Specialist credential. Make high-quality designs in AutoCAD while working for your organization.

Improve your skills

Set and track your goals to increase your AutoCAD skill set. AutoCAD Apprenticeship certification builds on knowledge from previous AutoCAD and AutoCAD LT experience.

Train your colleagues

Learn and earn credentials while teaching others. Share your skills to help your company get certified and save time and money.

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System Requirements For AutoCAD:

Windows 7/8.1 64 bit
Intel Core 2 Duo 2.4 GHz or AMD Athlon 64 x2 2.8 GHz
2GB Graphics
DirectX 9.0c
Minimum Hardware:


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