| Symbol | Description | Uses |
| R8ADB2 | 3 | |
| R8ADB3 | 3 | |
| R8ADB4 | 3 | |
| R8ADB5 | 3 | |
| R8ADBG | 3 | |
| R8ADF2 | 3 | |
| R8ADF3 | 3 | |
| R8ADF4 | 3 | |
| R8ADF5 | 3 | |
| R8ADFG | 3 | |
| R8FFTB1 | 3 | |
| R8FFTF1 | 3 | |
| R8FFTI1 | 2 | |
| RADB2 | 3 | |
| RADB3 | 3 | |
| RADB4 | 3 | |
| RADB5 | 3 | |
| RADBG | 3 | |
| RADF2 | 3 | |
| RADF3 | 3 | |
| RADF4 | 3 | |
| RADF5 | 3 | |
| RADFG | 3 | |
| RADLW | 7 | |
| RADSET | 2 | |
| RADSW | 5 | |
| RANDOM_SEEDX | 2 | |
| RAS | 18 | |
| RAYLEIGH | 2 | |
| RCANOP | 4 | |
| RCUNST | 2 | |
| READ_CHECKPOINT | Read the checkpoint | 3 |
| READ_FLD_XY_RL | 4 | |
| READ_FLD_XY_RS | 18 | |
| READ_FLD_XYZ_RL | 32 | |
| READ_FLD_XYZ_RS | 1 | |
| READ_OZ | 2 | |
| READ_QZ | 2 | |
| READ_REC_XY_RL | 11 | |
| READ_REC_XY_RS | 126 | |
| READ_REC_XYZ_RL | 35 | |
| READ_REC_XYZ_RS | 1 | |
| READ_REC_XZ_RL | 1 | |
| READ_REC_XZ_RS | 1 | |
| READ_REC_YZ_RL | 1 | |
| READ_REC_YZ_RS | 1 | |
| READSYMTILE_RS | 53 | |
| RECEIVE_COMPONENT_CONFIGS | 2 | |
| RECUR_Z | 2 | |
| REMOVE_MEAN_RL | 1 | |
| RFFTB1 | 1 | |
| RFFTF1 | 1 | |
| RFFTI1 | 1 | |
| RI_IWMIX | 2 | |
| RNCL | 2 | |
| RNDCLOUD | 2 | |
| RNEVP | 2 | |
| RSURFP | 4 | |
| RUNCLOCK_CHECK | 2 | |
| RUNCLOCK_GETTIME | 3 | |
| RUNCLOCK_INIT | 2 | |
| RUNCLOCK_READPARMS | 2 |