Abstract: Control logic circuitry for a printing apparatus which records data according to a predetermined color bar code on a moving record medium. The apparatus includes first and second recording stations and a feed mechanism for successively feeding the record medium thereto in equal increments, so as to provide equally-spaced recording locations on the record medium. First and second indicia (parallel bars printed in first and second colors) are recorded on the record medium at the appropriate recording locations in conformity with the code. The surface of the record medium is used for a third indicium, which likewise is recorded thereon in the form of a parallel bar. Data to be recorded on the record medium is entered through a keyboard and converted by the logic into a bar code which is fed to logic circuitry which controls printing apparatus at the first and second recording stations and the record medium feed mechanism, thereby determining the color printed on the recording medium.