“Samrit Kr. Upadhayay is an engineer behind this site.”
This site has various sub-sections that has been collected, written and compiled for multiple purpose and perhaps will help you too.
If you find any copyright issue in any study material do consider ” Education is right, not a copyright”. Move on from the page or report somewhere you find appropriate.
Thoughts in blog page is personal, If it hurt your personal sentiments or find harassing to others, do mail me, Because I love you.