Will database directory submission really help me in ranking

My Dear Brothers and Sisters

I request every SEO here to help me and if possible then please provide me the list of database directory related to Electronics, communication, gadgets, gizmos, and consumer electonics. ( Database directory website only) Database website i think every seo is aware of if not then sorry you are far back in SEO.

I never accepting anything for free but I always give everything you want for free.
So anything related to seo, SEM, Internet marking you want foreg. software, pdf or any unique technique I will give it for free. But try to provide me a wide list for such website.

Cool Mate and Enjoy your Day
Dashanan sharma