On researching over the available varmam texts, it is evident that varmam has grown under three independent schools of thoughts, mainly governed by three ancient siddha's namely Akasthiyar, Bohar and RamaDevar.
If we research the basic philosophies of the books in the category A1, A2 and A3, we can reach the philosophy of School A. Similarly by researching the basic philosophies of the books in other categories, we can arrive at the following three school of thoughts.
Please note that though we haven't come across any books written by Rama Devar, a separate school of thought has been created under his name. This is based on the inference from the following poem: