AutoCAD 21.0 Civil 3D Full Version (LifeTime) Activation Code [Win/Mac]









AutoCAD Crack+ (Final 2022)

AutoCAD is the leading commercial CAD application, accounting for more than 60 percent of all such CAD work done by architecture, engineering, and construction (AEC) firms and government agencies. AutoCAD has been called “the application of choice in the architecture, engineering, and construction industries.” It is the only widely used CAD program that supports all types of 2D and 3D drawings and drawings in the various 2D and 3D file formats.

AutoCAD is the most commonly used CAD program in the world, with over 50 million license users. In addition to architecture, engineering, and construction firms, AutoCAD has seen strong growth in the oil and gas, automotive, manufacturing, and other industries. AutoCAD’s broad customer base makes it the world’s leading CAD program in terms of installed base.

AutoCAD LT (originally Autodesk LT, for line-type, or 2D, AutoCAD) is the product of the AutoCAD development group, Autodesk. It is a commercial AutoCAD replacement for designing 2D drawings. Autodesk LT was released in 1987 and is licensed to users who do not have a full version of AutoCAD. The product is aimed at small, professional firms. AutoCAD LT is available in web, mobile, and desktop versions.

Table 1. Summary of Features

3D Modeling in AutoCAD LT allows for designing and creating both solid and surface-based 3D drawings. As shown in Figure 1, the foundation of AutoCAD LT is a three-dimensional coordinate system. While this 3D coordinate system is a key concept in AutoCAD, AutoCAD LT uses a different method for displaying three-dimensional objects on the screen. AutoCAD LT uses a wire-frame display, which is typical in wireframe 3D drawing programs. Therefore, the objects are easier to understand when the objects are represented by lines, which are also drawn in wireframe 3D drawing programs.

Figure 1. A three-dimensional coordinate system in AutoCAD LT

Surface models are representations of 3D objects as a series of triangular facets connected by thin lines. When building surface models in 3D, object-oriented programming, which is used in AutoCAD, is not required because the surface models can be created in a standard programming language, such as Visual Basic, C++, or Visual C#. AutoCAD LT uses a data

AutoCAD Crack Free License Key

Programming techniques
AutoCAD was one of the first applications to implement a programmable scripting language for user interaction and customizing macros. The AutoLISP scripting language was released in 1994, the same year AutoCAD was released. It is based on the programming language LISP and was implemented in C.

AutoCAD provides integrated Python support, and third-party providers of Python add-ons include Lektor and PILAS (both of which were acquired by Autodesk in 2017).

In the late 1990s, the original AutoCAD was replaced by version 2000. The new version was a bit more programmable than the original, though its scripting capabilities remained limited and mostly behind the (often non-programmable) macro functionality. Today, the scripting language is considered to be Turing complete.

Starting with the release of AutoCAD 2016, there is native support for Perl scripting. This is called AutoLISP and it is the default scripting language for AutoCAD. Perl is considered by many users to be the scripting language of choice for AutoCAD because it is very flexible, very powerful, and has the widest user base.

Along with native support for AutoLISP, Autodesk added support for Python in AutoCAD 2017. Python is also supported on AutoCAD Professional and AutoCAD LT.

The latest version of AutoCAD, 2019, introduces Python as the main scripting language.

Other add-ons
In the early days of AutoCAD, users could add basic custom macros using the AutoLISP programming language. Because of the complexity of customizing the software and its programming, users were discouraged from doing so and this feature was eventually removed.

AutoCAD included a graphics file converter called AutoConvert. It was later superseded by a competitor named AppConvert from other software company Autodesk. AutoConvert was a part of the original version of AutoCAD, but was replaced in version 2000 by AppConvert, a standalone application. AppConvert is no longer offered as part of AutoCAD.

The application compatibility list is a file with a list of components and programming environments. The list is kept in the registration database and contains information about AutoCAD’s programming interface. These include the programming language, system requirements, and database access methods.

AutoCAD Exchange is a web-based application that allows users to share CAD drawings with other users

AutoCAD Crack + Registration Code

Open Autocad and click the “help” button to download and install the key.
If you get an error message, it means that the serial number you entered is not valid.
If you do not get any error message, then the key is installed.

How to uninstall the key
Uninstall Autocad and the key.

I hope it helps you.


We don’t suggest to use crack or keygen to change your version, we only suggest to contact your Autodesk support to request a full refund for your copy of Autodesk Design Review 2018 and then download the new one from Autodesk.


java clone() optimization

when i called clone() function of Object type (including String and boolean type), does it mean that all the objects that stored inside Object is copied?
Or only the reference to the object is copied?
I understand that Object is the “class” type, that means, it means for primitive types, only their primitive value is copied?
String str = “test”;
String str2 = (String) str.clone();

Integer i = 2;
Integer i2 = (Integer) i.clone();

Boolean b = true;
Boolean b2 = (Boolean) b.clone();

are they are equivalent?


I understand that Object is the “class” type, that means, it means for primitive types, only their primitive value is copied?

You got it wrong. It means that the method uses an Object to copy the value. (You can’t copy primitive values directly, the target must be an Object)

e.g: String str = “test”;

This is not a primitive type, but a String. To do a deep copy you need to use the clone method.

String str2 = (String) str.clone();

The result is a String, not a String instance. Strings are immutable, and when you do a clone you copy the reference (which is not the same as the reference’s value). You have two String objects (one for the source and one for the result).

Integer i = 2;
Integer i2 = (Integer) i.clone();

The result is a Integer, and not an Integer instance. You have two Integer objects (one for

What’s New In AutoCAD?

Markup Import and Markup Assist include the following:

Markup Import

• Import Feedback from PDF or Printed Paper in One Step

• Auto-Generate Comments or Callouts on your Document

• Convert Vector/PDF to Paper

• Auto-Attach Comments

• Auto-Send Comments to Print Media and Design Team

• Auto-Edit Comments or Callouts

• Auto-Update Comments or Callouts

• Add comments to Drawing and Filename

• Report Comments

• Edit Comments

• Click to Add Comments

• Word Wrap

• Auto-Generate Callouts

• Convert Vector/PDF to Paper

• Auto-Attach Callouts

• Auto-Update Callouts

• Add Callouts to Drawing and Filename

Markup Assist

• Convert Vector/PDF to Paper

• Auto-Convert Drawings into Paper

• Auto-Create Callouts on Document

• Auto-Generate Comments

• Auto-Update Comments

• Add Comments to Drawing and Filename

• Edit Comments

Drawings in AutoCAD:

Drafting Tools

• Simplify Circles: Get a faster, more accurate result by adding only the center circle in the command, rather than the full circle that AutoCAD suggests. (video: 2:39 min.)

• Direct Editing: Give AutoCAD more of your attention by cutting the 3D/2D interface and allowing you to edit directly on the screen.

• 3D Drafting

• Move Selected Objects

• Copy and Paste

• Clear

• Orbit

• Perspective Transform

• Release

• Hiding

• Rotate Selected Objects

• Select and Reposition

• Object Snap

• Line Segment Object Snap

• Angle Snap

• Intersect

• Move Selected Objects

• Copy and Paste

• Clear

• Orbit

• Perspective Transform

• Release

• Hiding

• Create Family

• Create Group

• Rename

• Release objects

• Hiding

• Orbit

• Perspective Transform

• Clear

• Mesh Workflow

• Skew

• Edit bounding box

System Requirements For AutoCAD:

OS: Windows XP SP3 or later
Windows XP SP3 or later Processor: Intel(R) Core(TM) 2 Duo CPU (i586) or AMD Phenom(R) II X2 550 Processor, or better
Intel(R) Core(TM) 2 Duo CPU (i586) or AMD Phenom(R) II X2 550 Processor, or better Memory: 2GB RAM
2GB RAM Hard Disk: 50 GB available space
50 GB available space Sound Card: DirectX 9.0c-compatible sound card with support

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