Basically Generic servelets are the mother of all servelets.
Normally all the
servlets are the subclasses of this Generic Sevlets.There is a major difference between Generic and http
(Servlets) for which you can refer Servlets by (O'reilly pubs).
I think it comes in the first or the second chapters.
I have it at the tip of my tongue but i am not able to recall it.
HOpe this helpful