This publication considers some Freudian ego mechanisms. The first discussion and bibliography concerns defense mechanisms, in general or in multiple; after which, the discussions and bibliographies concern specific defense mechanisms: denial; displacement, substitution, sublimation; fixation; identification, introjection, incorporation, internalization; intellectualization, obsessive ideation, compulsion; projection; rationalization; reaction formation; regression; and repression. Key understandings and sources are noted. The discussions and bibliographies range from the earliest professional (psychoanalytic, psychiatric, and/or psychological citations to researches in the middle 1960's. (Author)