digital electronics

this book is very good. you can find out a lot. so after any time, you need to study again this book

it is Multisim 12.0 program. You can draw any circuit on this program. also you can do simulation on this program. this book and this program are connected with each other.

you can download this program from following link

http://www.ni.com/multisim/try/

1. you can choose one of these three. you need to choose first one (Multisim Education Edition)