I've been reading a few books and web sites on OOAD, OMT & OOSE and am a bit lost. I understand that Use-case diagrams came from OOSE but I don't know what specific concepts came from OMT and OOAD. I've had a long look around the internet but am at a lost. I think that class diagrams and object diagrams come from OOAD but can't seem to verify this anywhere.
1) What concepts are unique to OOAD or were essential parts of OOAD
2) The same question but for OMT.