Autocad is a versatile tool for engineering and  architectural drawings. The course is result of many years of experience of teaching the subject. It gives step by step procedure and explains the  geometrical concepts. As every command is separately presented , it is easier to navigate and check out the desired information. Different sections are created in such a way that all the related or interlinked commands can be studied together. Alaso commands are presented in such a way that older or newer versions will not pose any problems.