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AutoCAD Product Key History:

AutoCAD was originally developed by Corel Corporation for the purpose of creating two-dimensional (2D) and three-dimensional (3D) diagrams for architectural and engineering documents. The user would place the drawing elements on a graphics screen to create a drawing. The development of the program was not by Corel’s own internal engineering team. Corel contracted outside contractors to write the code and the documentation.

While the program did have commercial potential, in 1985 Corel Corporation released AutoCAD Classic for the PC. This version was distributed with a unique manual called CAD Advice, which was an abbreviated version of Autodesk’s 1D Drafting and Design book, as well as a training DVD called 1D Construction. With AutoCAD Classic, Corel added a database for file storage and general maintenance functions. Corel also created a “Refresh” button to update the database.

The original AutoCAD, being a point-and-click application, only allowed for 2D drawings. The design of the product and the limitation of the technology at that time made it unable to create 3D drawings. Because of the limitations of the original program, Corel released a 2D version of AutoCAD called AutoCAD LT in 1991. AutoCAD LT is a Windows-based menu-driven drawing program with the ability to create, edit and view 2D and 3D drawings and other types of drawings. In 1995, Corel released AutoCAD LT R13, which included a compatibility program to allow AutoCAD LT to open and display files created with AutoCAD Classic.

Because of its lack of a database, AutoCAD LT could not store drawings in a drawing management system like CorelDRAW. AutoCAD LT did, however, have the ability to store the user’s drawing in a text file and open it again later. AutoCAD LT also lacked many of the advanced 3D editing features that would later be added to AutoCAD. By 1997, Corel had discontinued the development of AutoCAD LT and released the successor to AutoCAD Classic, called AutoCAD 2004, which was rewritten entirely as a Windows-based menu-driven application.

AutoCAD 2004 has since become the dominant CAD program on the market. AutoCAD is no longer released as a DOS application. AutoCAD was included in Windows as a separate application from the OS beginning with Windows XP.

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The AutoCAD drawing information is represented in an XML based format, and includes basic data on each layer such as color, line style and line weight, as well as other more detailed layers properties such as text, hatch fills and annotation.

DXF information is also exported from some third-party applications for compatibility purposes, including Microsoft Excel, Microsoft Project and Microsoft Visio. For example, the DXF File format was the basis for Visio and Visio alternative applications.

Notable features

AutoCAD’s predecessor, DGN, was created in 1990. Version 1.0 was released in September 1991. Before that, it was known as DGN++. The first release was a single-user program which could not connect to any other file-based information systems.

Version 2.0 was the first version to include the ability to import and export to other file-based information systems, allowing for the creation of database-based systems.

Version 2.1 was the first version with real-time collaboration, allowing two or more users to work in real-time on the same drawing. This enabled features such as moving drawings to common locations or changing a drawing at the push of a button, which were previously only available in batch files.

Version 2.2 added the ability to open and display CADX files.

Version 2.7 added features such as visual feedback, object tracking, the ability to delete objects automatically and the ability to take into account the object origins when measuring distances.

Version 3.0 introduced features such as the ability to use AutoCAD’s rendering engines.

Version 3.5 added the ability to use the DXF file format in a rendering engine.

Version 3.6 added the ability to perform 2D to 3D conversions and AutoLISP as a programming language.

Version 3.7 introduced the ability to keep track of the coordinates of external objects and features.

Version 3.8 included the ability to use a custom coordinate system on a drawing, making it possible to shift around a drawing without needing to re-move the objects that were already created.

Version 3.9 included the ability to run custom macros without having to export them to the application.

Version 3.12 included the ability to edit and create complex meshes.

Version 3.20 introduced the ability to modify a drawing directly from an operating system’s text editor.

Version 3.22 introduced the ability

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Large-Scale Synthesis of Sn-based MOFs with Large Pores and High CO2/N2 Separation Efficiency.
Large-pore mesoporous metal-organic frameworks (MOFs) with high porosity and high CO2/N2 selectivity are attractive due to their outstanding potential in industrial CO2 capture. However, the synthesis of large-pore MOFs requires either complicated linker chemistry or MOF crystallization in a supercritical fluid. Herein, we report the synthesis of large-pore Sn-based MOFs with tunable CO2/N2 separation properties using a facile solvothermal method. The large-pore MOFs with different pore sizes have been systematically synthesized by simply tuning the concentrations of Sn(OCH3)2·2H2O and 4,4′-bipyridine. Theoretical calculations indicate that the increased pore size originates from the confinement effect of the solvent molecules and the concomitant lengthening of the cavity, which results in the significant elongation of the Sn-O-C bond and the contraction of the Sn-C bond. The achieved large-pore MOFs are characterized by X-ray diffraction, N2 sorption, gas permeation, and 13C solid-state nuclear magnetic resonance spectroscopy. In the CO2/N2 separation performance, the large-pore MOF with a 1.62 nm pore exhibits an excellent CO2/N2 separation efficiency of 99.25%, while the carbon capture performance of the other two MOFs with a smaller pore size is similar to that of the reported bulk MOFs. The obtained large-pore MOFs will be promising materials in the large-scale separation of CO2 and N2 in the future.Q:

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What’s New in the?

Markup Assist makes it easy to test several design alternatives by simulating the current design so you can see how changes would impact different parts of your design, without redrawing.

Display Tip: Intuitively control your view. With the new zooming feature in AutoCAD 2020, you can now zoom freely to any detail level to view the drawing as you see it. (video: 1:30 min.)


AutoCAD now has a built-in set of built-in dimension styles for easy alignment of dimensions that follow engineering conventions and standard formats.

Architectural, Engineering, and Mechanical:

Architectural families can now be customized with a single drop-down list selection in the UCS property sheet, and you can choose from a wide variety of ArchiCAD and 3D-BIM-oriented families. You can also import other families. (video: 2:10 min.)

You can customize your field labels with new menu options. Create custom field labels, and you can choose the name of a field from a drop-down list. You can also choose from the built-in standard field labels for example in the FieldName property. (video: 2:20 min.)

The command line now includes a new metric option for converting points to linear feet and meters. Use the new convertpoint –metric command to measure distances and areas. (video: 2:20 min.)

Powerful Raster image format support:

AutoCAD now supports a wide variety of graphics formats, including JPEG, GIF, TIFF, BMP, and many more. In addition, AutoCAD supports the following image formats: CAD, DXF, DWG, EMF, EPS, PNG, TGA, and JPG. (video: 1:10 min.)

New fast thumbnail zooming and panning features:

You can now zoom into and pan around drawings rapidly with the new ZoomTo and ZoomFrom features. You can also increase or decrease the size of thumbnails to quickly view details. (video: 1:25 min.)

It is now easy to navigate your drawings with a new Navigation pane and Quick Access Toolbar. You can now choose from a wide variety of commands to get to the sections and layers you want to work with. (video: 2:20 min.)

Drawing commands:


System Requirements For AutoCAD:

Mac OS X v10.10 or later
Intel Core 2 Duo processor or equivalent
16 GB available space
For the Mac Pro, the minimum is 4GB of RAM. Mac Pro running OS X 10.8 or 10.9 may also be able to run the iWork ’09 suite.
Windows 7, 8, or 10
Intel Core 2 Duo or equivalent
Mac OS X v10.10 or later is required for the Pages ’09 application.