Beginning in 1978, Warren created and published the "Intelligent Machines Journal" ("IMJ", which is also Pig Latin for "Jim"), the first subscription news periodical about microcomputing, published as a tabloid newspaper, with Tom Williams as its founding Editor. Warren sold "IMJ" in late 1979, to Patrick McGovern, the founder of the International Data Group and numerous computer periodicals worldwide, notably including "Computerworld". McGovern quickly renamed "IMJ" to be "InfoWorld", as his first microcomputer periodical, later converting it to various glossy magazine formats.