\hspace{1.3cm} \b{tabular}{|l@{\hspace{0.1cm}}c@{\hspace{0.1cm}}c@{\hspace{0.1cm}}c@{\hspace{0.1cm}}r|} Language & {\footnotesize LP} & {\footnotesize OO} & {\footnotesize ||} & References \\ \leftcomment{\footnotesize LP + OO} \hspace{-0.35cm} Logical Objects & + & + & - &  [Co88] \\ SPOOL & + & + & - &  [FH86] \\ Communicating Prolog Units & + & + & + &  [MN86] \\ \leftcomment{\footnotesize LP + ||} \hspace{-0.35cm} Vulcan & + & + & + &  [KTMB86] \\ Polka & + & + & + &  [Da89] \\ Delta Prolog & + & - & + &  [PN84] \\ \leftcomment{\footnotesize OO + ||} \hspace{-0.35cm} MultiLog & + & + & + &  [Ka88] \\ Orient84/K & + & + & + &  [IT86] \\ \e{tabular}