Security Electronics 2nd Ed 1977 Book John Cunningham Howard W Sams Blue White Howard W. Sams Security Electronics by John E. Cunningham provides an in-depth look at the principles and operation of electronic security devices. This second edition covers a wide range of topics including detection devices, alarm systems, infrared systems, and microprocessor applications. Inv.# B37xB19 Keywords: Vintage Electronics, Security Systems, Engineering, Technical Guide, 1970s, Retro Tech, Alarm Systems, Surveillance, Howard Sams, Educational, Reference Book, Collectible, DIY Security, Electronic Engineering, Industrial Security Reasonable offers welcome. Ships within 1 business day from Good Clucking Threads (business days are Monday–Friday, excluding postal holidays). While we inspect carefully, minor human errors can occur — photos show the exact item. Questions? Happy to help. #70s #Minimalist