Embedded FreeBSD Cookbook
Paul Cevoli
Programmable Logic Controllers - Fourth Edition
William Bolton
Wireless Networking
Praphul Chandra & Daniel M. Dobkin & Dan Bensky & Ron Olexa & David Lide & Farid Dowla
Digital Systems Design With FPGAs and CPLDs
Ian Grout
Electronics -- Fourth Edition: Circuits and Systems
Owen Bishop
Programmable Logic Controllers - Sixth Edition