While reading the source code, I noticed comments like "-cim 9/10/89". I think this might be an annotation by a developer to indicate the commit time, but from the commit history (using git), they does not seem to match.
It's the initials of the person who, back in 1989, wrote the preceding comments
* Note: most of these are "incomplete" because I didn't
* need the ones not defined. More should be added * only as necessary -cim 10/26/89
"I" == cim == ???
PostgreSQL inherited the code which is when our git history begins. This comment was part of the original source.
I do not know the full name of the person those initials refer to.
