  The aim is to correct part of the Remark 3 of my paper "On regular,
intra-regular ordered semigroups" in Pure Math. Appl. (PU.M.A.) 4, no. 4
(1993), 447--461. On this occasion, some further results and the similarity
between the $po$-semigroups and the $le$-semigroups is discussed.
