AutoLISP Programming

AutoLISP
VisualLISP
AutoLISP - Getting Started
AutoLISP - VisualLISP Books
AutoLISP - Using Setq Function
AutoLISP - Open VisualLISP Editor
AutoLISP - AUGI Training Course Material

AutoCAD Programming

AutoCAD VBA
AutoCAD.Net
AutoCAD Customization

CAD Customization - SolidWorks, SolidEdge, Inventor Programming

What is CAD Customization?
SolidWorks VBA
SolidEdge VBA
Inventor API Programming