EOLL is just orientation
here
aand COLL doesnt preseve edge orientaion so you would have to do either COLL then ELL or ELL/CLL visa versa
so i was partially wrong
EOLL-Edge orientaion of last layer
ELL- edges of last layer
COLL- Corners of last layer, doesnt preseve edge orientation
CLL_ same as COLL but preserves edge orientation
and CO- is corner orientation.
to me they are all named inconsistently.
all my information come straight from the wiki