Inkscape is the (very good) open source alternative to such programs as Adobe Illustrator and Corel Draw.It's capable of producing professional quality illustrations.
Each time we draw a shape in Inkscape,it's been registered as an (programming) object by the program.This concept is very essential for the understanding of some more complex drawing concepts.
In this introductory tutorial we explain this object-oriented aspect of Inkscape in a beginner's friendly fashion