| Abstract: | In this paper we impose the Indian parallelism restriction on the unary developmental system, i. e. on UOL system. We observe that corresponding to any PaUL language we can get a unary language of Restricted parallel content free language (RPaCLUL). Section 1 deals with definitions and Section 2 deals with some propoerties of PaUL systems. In Section 3, we compare PaUL language with unary languages of parallel content free grammars and also characterize some subfamilies of PaUL languages. In the last section, we state a few hierarchial and closure properties. |
