%0 Article %A Michalik Marek %D 2000 %G English %B Acta cybernetica %@ 0324-721X %T F codes %U http://acta.bibl.u-szeged.hu/12641/1/cybernetica_014_numb_003_485-489.pdf %X The notion of an F code is introduced as a generalization of the notion of an L code. All interrelations between ordinary codes of bounded delay, L codes of bounded delay and F codes are established. Attention is also focused on unary morphisms. Many of them are F codes.