| KEY | N | I | VAR | Short description | COMMON | GINIT |
| HSTA | 20 | M | LHSTA | names of required standard histograms, see [BASE110] | /GCLIST/ | Blank |
| OPTI | 1 | I | IOPTI | automatic optimisation of the geometry via GSORD | /GCOPTI/ | 1 |
| RNDM | 2 | I | NRNDM | initial random number seed (2 words) | /GCFLAG/ | 0 |
| RUNG | 2 | I | IDRUN | user run number | /GCFLAG/ | 1 |
| IDEVT | first user event number | /GCFLAG/ | 1 | |||
| SORD | 1 | I | ISTORD | stack ordering flag | /GCSTAK/ | 0 |
| TRIG | 1 | I | NEVENT | total number of events to process | /GCFLAG/ | 10000000 |
| TIME | 3 | M | TIMINT | time left after initialisation (see Notebelow) | /GCTIME/ | |
| TIMEND | time required for termination | /GCTIME/ | 1 | |||
| ITIME | test every ITIMEevents | /GCTIME/ | 1 |
Note: the time allowed for the job after initialisation cannot be set by the user via the data record. To set the total time for the job the user should call the TIMEST routine at the beginning of the program before any call to GEANT routines. This variable in the data record has not been removed for backward compatibility.