Computer software for 3D printer management; computer software for processing equipment, namely, software for use in the field of 3D printing; thermionic tubes; semi-conductors; electronic circuits; computer programs, downloadable, namely, downloadable computer software for use in the field of 3D printing; Electronic game programs for home video game machines; electronic circuits and CD-ROMs recorded with programs, namely, multimedia software for hand-held games with liquid crystal displays; ...