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AutoCAD 23.1 Free Download

AutoCAD Crack (left) and Inventor by Autodesk. (Image: Autodesk)

AutoCAD Download With Full Crack became the CAD standard for the industry, and later was ported to non-graphics computers. Today, AutoCAD remains the premier industry-standard CAD application for desktop computers and mobile and web apps.

AutoCAD is built on an industry-standard Microsoft Windows architecture, and uses DirectX as its rendering API. It runs on a wide range of computer hardware, including microcomputers, desktop computers, and workstations, as well as the majority of mobile devices. AutoCAD is available in English, French, German, Italian, Japanese, Korean, and Simplified and Traditional Chinese.

About the Author: Steven F. Anderson is a professional historian, analyst, and programmer, specializing in the analysis of non-English, non-North American military history.


Autodesk developed AutoCAD during 1982 and 1983 as a PC-based desktop and engineering application for 2D drafting and graphical design. The first version of AutoCAD was released for PC-DOS in December 1982.

AutoCAD’s first name, “AutoCAD,” came from the initials of the company’s founders, Bernard C. “Bernie” Cohen and Bob Thomas. Thomas was responsible for the technical and design aspects of the application, while Cohen wrote the code and managed the technical side of things. (Thomas’ team included programmer Mike Janson.)

AutoCAD was originally developed on IBM PC/XT-compatible systems by a team in Minneapolis. At first, AutoCAD used IBM DOS software for the operating system and was written in assembler. It was also the first commercially available application that used the newly introduced X windowing system. The X windowing system provided a graphical windowing environment for IBM PCs with integrated graphics adapters and allowed 3D vector graphics to be displayed.

Cohen and Thomas hoped to get funding to support the development of AutoCAD by publishing a US$10 million annualized revenue, assuming a single profit center.

About a year after the introduction of AutoCAD, Autodesk bought PC-Dos, Inc., which owned the copyright to AutoCAD, and it became Autodesk AutoCAD. A year later, Autodesk released its first version of AutoCAD for Mac on the Apple Macintosh platform.

In 1985, Autodesk released AutoCAD for the

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Add-on software can be used to extend or customize AutoCAD Crack For Windows or Autodesk software applications. AutoCAD DXF files can be imported or exported to other applications such as ArcGIS.



Many companies have developed custom software for AutoCAD to add custom functionality. For example, DDM Technologies developed parts for the Autodesk Inventor and AutoCAD products which provide custom capability. The following is a list of AutoCAD services provided by third-party companies.

One-time solutions

Simulated Panorama
Geospatial solutions

There are a number of programs that automatically convert the camera coordinates of a still image into geographical latitude and longitude values. Because the mathematical computations involved in calculating a simple (panorama) or complex (stereopanorama) perspective view of the image do not change with the camera angle, a generalized photographic formula is sufficient for most uses. The following two programs, Photomap and Panorama, were released in 2013.

Photomap is a Windows-based application that automatically maps the Panorama’s image elements into latitude and longitude coordinates.
Panorama” is a free cloud-based solution that provides tools for stereopanorama and orthogonal panorama.

Multi-user solutions


The ActiveView editor is a drawing tool that allows multiple users to edit a single drawing file simultaneously and provides a web viewer that displays the editors’ drawings in real time. It is not designed for users who are solely focused on the technical aspects of drafting, such as those working in architectural offices.

AutoCAD add-ons

Autocad Urban Design
Autocad Civil 3D
Autocad Architecture
Autocad Electrical
Autocad Landscape Architecture
Autocad Construction
Autocad Mechanical
Autocad Product Design
Autocad Interface Design
Autocad Mobile
Autocad Library
Autocad Photoshop
Autocad 3D
Autocad 3D Wireframe
Autocad 3D Project
Autocad Infrastructure
Autocad | Maps
Autocad | Project
Autocad | Resource Management
Autocad | Viewport
Autocad | Visualization
AutoCAD Collection
AutoCAD Drawing
AutoCAD Inventor
AutoCAD Architecture
AutoCAD Electrical

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Influence of a left-to-right shunt on the development of acute pulmonary hypertension in piglets.
With the aim of elucidating the role of the ductus arteriosus in the development of pulmonary hypertension during the first hours of life, we have studied the effects of a left-to-right shunt on the development of pulmonary hypertension in newborn piglets. Thirty-four newborn piglets were studied. Two groups of animals were studied. One group (n = 20) had a right-to-left shunt induced by a vascular clip on the ductus arteriosus (DA group). The remaining group (n = 14) was included as control (no DA group). Pulmonary arterial pressure (PAP) and systemic arterial pressure (SAP) were measured by means of a double-indicator micropressure system at the end of the first, second, and third hours of life. The size of the shunt was 0.2 +/- 0.03 mm in the DA group and 0.01 +/- 0.02 mm in the control group (NS). The cardiac output (CO) was similar in both groups (DA group, 1.68 +/- 0.22; control group, 1.73 +/- 0.26 In the DA group, a decrease in PAP was observed from the end of the first to the second hour of life (8 +/- 1 mmHg) (p less than 0.001) and from the second to the third hour of life (8 +/- 1 mmHg) (p less than 0.001). In the control group, a slight increase in PAP was observed between the first and the second hour of life (4 +/- 1 mmHg) (p less than 0.05) and between the second and third hour of life (5 +/- 1 mmHg) (p less than 0.05). The PAP-SAP gradient was significantly higher in the DA group than in the control group at the end of the first hour of life (40 +/- 8 mmHg versus 17 +/- 4 mmHg) (p less than 0.001), and at the end of the second hour of life (30 +/- 9 mmHg versus 8 +/- 1 mmHg) (p less than 0.001). In the DA group, a decrease in CO was observed between the second and third hours of life (1.2 +/- 0.4 L.

What’s New in the AutoCAD?

Add additional dimension styles to your drawings: manipulate your parts with realistic proportions from around the world or from your personal library. (video: 1:40 min.)

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Create accurate floor plans, BIM and multi-section models using arc, rect, ellipse and parabola objects. (video: 1:33 min.)

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Available on all AutoCAD and AutoCAD LT platforms, AutoCAD 2020 is the first release to support the new 2D drawing model, the second release to support the new model-based 2D drafting and the third release to support the new parametric surfaces. In addition to new features, AutoCAD and AutoCAD LT will also continue to deliver cutting-edge technology that brings you a powerful workflow, a seamless integration with design and engineering software from industry leaders, an interface that supports multi-monitor, and greater compatibility with 3D printing and scanning.

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