You can work with many different types of files, including files created with other applications and files created in earlier releases of the program. You can also specify search paths for drawing and support files.
You can import, attach, or open files, other than DWG files, that were created with other applications into your drawings.
If you need to use the information from a drawing file in another application, you can convert it to a specific format by exporting it. You can also use the Clipboard.
You can share drawing files from AutoCAD and AutoCAD LT, drawing files from previous versions, and drawing files that contain custom objects. In some cases there are limitations.