What is a .Step and .IGES format in CAD Softwares?

What is a .Step and .IGES format in CAD Softwares?

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http://grabcad.com/questions/what-is-step-iges
STEP / IGES is the format that is supported by nearly all the CAD software and even other engineering software such as Gambit Ansys Abaqus Adams and ...
another point is that STEP / IGES could also be read by windows notepad. and also could be read by programmable software such as Matlab
the disadvantage is that a STEP file is not editable and the design tree of the model is not available too.

 
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Thank you so much guy. your hints was really useful.

 
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