Different Types of drawings

1.Life Drawing - drawing as a means of expression; drawing from direct observation as in still-life

2.Cave Drawing - drawing on cave walls of mostly animals

3.Emotive Drawing - drawing in an expressive way,to explore & put feeling, mood & so on.

4.Sketching - drawing in order to explain or actively thing through a problem.

5.Analytic Drawing - drawing as a way to dissect, understand and represent.

6.Perspective drawing - drawing as a way to represent volume, space, light, eye level, surface, planes & scales.

7.Diagrammatic drawing - drawing in order to investigate, explore & document concepts & ideas.

8.Illustration drawing - drawing in order to document; drawing to clearly state & render intent, style, size, color, character, effect and so on.

Source: http://drawingconnections.blogspot.com/2007/04/types-of-drawing-making-marks-for-good.html.

http://en.wikipedia.org/wiki/Drawing