Look up the latest version of the AMC 20-25 draft is a good starting point for what is required in implementing an EFB solution - 470 pages, although the last 55 pages are where you really need to be looking.
I have noticed that in the UK at least, they (CAA) still seem to refer to JAA TGL 36 - who knows why, as that dates back to October 2004!.
The hardware solution depends on various factors, and if it's a C.O.T.S. system your looking to use, with say a 3-5 year life span, then given that most Apps are generally iOS authored, the iPad is a good bet.....it's not by any means a quick and easy job if your AOC operations, and I'd consult your FOI right from the outset to discuss what they will need to see and hear for your Trial Evaluation Period - will save time and money right from the beginning IMHO.
F/o