Those are keywords relevant to EOM-CC and CI methods handled by CCMAN/CCMAN2. Most of these $rem variables that start CC_ and EOM_.
| EOM_DAVIDSON_CONVERGENCE | EOM_DAVIDSON_MAXVECTORS |
| EOM_DAVIDSON_THRESHOLD | EOM_DAVIDSON_MAX_ITER |
| EOM_NGUESS_DOUBLES | EOM_NGUESS_SINGLES |
| EOM_DOEXDIAG | EOM_PRECONV_DOUBLES |
| EOM_PRECONV_SINGLES | EOM_PRECONV_SD |
| EOM_IPEA_FILTER | EOM_FAKE_IPEA |
| CC_REST_AMPL | CC_REST_TRIPLES |
| CC_EOM_PROP | CC_TRANS_PROP |
| CC_STATE_TO_OPT | CC_EOM_PROP |
| CC_EOM_PROP_TE | CC_FULLRESPONSE |