There are two primary goals that this book wishes to achieve; 1) Reliability through redundancy of design that is not dependent upon the capability of the rest of the system, and 2) the maximum security achievable for our highly classified facilities that we are dependent upon for our survival. In order for each chapter to be a stand-alone entity, in some cases repetitive material found in other chapters is included to facilitate continuity. Hence you won't have to go to other chapters and sub heading to keep you abreast of the current material. There are two chapters, 7 and 9, that have specific items identified for civilian government contractors who perform oversees work at our embassies, chancelleries, and military facilities.