Tradecraft is a general term that denotes a skill acquired through experience in a trade. The term is also used within the Intelligence Community as a collective word for the techniques used in modern espionage. It can be used to refer to general topics or techniques (dead drops, for example), or the specific techniques of a nation or organization (the particular form of encryption used by the NSA, for example). The term in this sense is frequently used in the books of John le Carré and To… (More on Tradecraft)