| QSAM | BPAM | VSAM |
| IDCAMS | Data Set Information | MVS Supervisor Services |
| General REXX Extensions | DB2 |
| CLOSE | Finish processing a sequential data set or PDS member. |
| GET | Read a record. |
| OPEN | Begin processing a sequential data set or PDS member. |
| PUT | Write a record. |
| CLOSE | Finish processing a partitioned data set. |
| FINDM | Position to a PDS member and (optionally) retrieve the contents of its directory entry. |
| GET | Read a record. |
| OPEN | Begin processing a partitioned data set. |
| PUT | Write a record. |
| STOWM | Create/update/delete a directory member. |
| CLOSE | Finish processing a VSAM data set. |
| ENDREQ | Force buffers to be written and relinquish control of a control interval. |
| ERASE | Remove a record from a VSAM file (does not apply to ESDS). |
| GET | Read a record (or CI) from a VSAM file. |
| OPEN | Begin processing a VSAM file. |
| POINT | Position to a specific record. |
| PUT | Write a record (or CI) to a VSAM file. |
| VERIFYV | Correct end-of-data information. |
| DSNDEL | Remove a data set from the catalog and/or VTOC. |
| LISTC | List cataloged data sets. |
| DDNINFO | Retrieve allocated data set information. |
| DSNINFO | Retrieve data set information. |
| LISTA | Retrieve current allocation information. |
| LISTM | Retrieve PDS directory information. |
| DEQ | Relinquish control of a resource. |
| DOM | Remove a message from an operator console. |
| ENQ | Obtain control of a resource. |
| FREEMAIN | Free processor storage. |
| GETMAIN | Allocate processor storage. |
| POST | Indicate event completion. |
| RACROUTE | Verify access to a resource. |
| WAIT | Wait for event or time interval completion. |
| WTL | Write a message to the system log. |
| WTO | Write a message to a system operator. |
| WTOR | Write a message to a system operator and retrieve the operator's reply. |
| D2F | Convert a REXX decimal number to S/390 floating point format. |
| D2P | Convert a REXX decimal number to S/390 packed decimal format. |
| D2PIC | Format a REXX decimal number under the control of a COBOL-style picture specification. |
| F2D | Convert a S/390 floating point number to REXX exponential format. |
| MATCH | Compare strings with a pattern. |
| P2D | Convert a S/390 packed decimal number to REXX decimal. |
| PARSETOK | Parse a string into tokens. |
| PIC2D | Convert a picture-printed number to REXX decimal. |
| QWIKREF | Access elements of the MVS/Quick-Ref database. |
| SWXTERM | Terminate a REXXTOOLS environment and free all allocated resources. |
| STEMSORT | Sort the elements of a REXX stem variable. |
| STORAGEX | Extract portions of and/or change processor storage. |
| WORDSORT | Sort the blank-delimited words in a string. |
| DB2INFO | Obtain DB2 subsystem names and default settings information. |
| DSNALI | Connect to and disconnect from a DB2 subsystem. |