| SYS$ABORT_RU | Aborts a recovery unit transaction |
| SYS$ABORT_TRANSW | Aborts a transaction with wait synchronization |
| SYS$ADJWSL | Adjust working set limit |
| SYS$ALLOC | Allocate a device or resource |
| SYS$ASCEFC | Convert ASCII to event flag |
| SYS$ASCTIM | Convert time to ASCII format |
| SYS$ASCTOID | Convert ASCII to ID format |
| SYS$ASSIGN | Assign device to logical name |
| SYS$BINTIM | Convert binary to time format |
| SYS$BINTIM_UNIX | Converts Unix timestamp to binary format |
| SYS$BRDCST | Broadcast a system message |
| SYS$BRKTHRU | Send break-through message |
| SYS$BRKTHRUW | Break-through message with wait |
| SYS$CANCEL | Cancel I/O request |
| SYS$CANEXH | Cancel exception handler |
| SYS$CANTIM | Cancel a timer request |
| SYS$CANWAK | Cancel wake request |
| SYS$CHECK_PRIVILEGE | Verifies if a process has a specific privilege |
| SYS$CHECK_PRIVILEGEW | Checks for privileges with a wait option |
| SYS$CLOSE | Close a device or file |
| SYS$CLREF | Clear reference bit |
| SYS$CMEXEC | Execute in executive mode |
| SYS$CONNECT | Connect to a device |
| SYS$COPY | Copies a file or resource within the system |
| SYS$CREATE | Create an object or resource |
| SYS$CREATE_REGION_64 | Creates a 64-bit memory region |
| SYS$CREATE_UID | Generates a unique identifier |
| SYS$CRELNM | Create a logical name |
| SYS$CRELNT | Create a logical name table |
| SYS$CRELOG | Create a login entry |
| SYS$CREMBX | Create a mailbox |
| SYS$CREPRC | Create a process |
| SYS$CRETVA | Create a virtual address |
| SYS$CRETVA_64 | Creates a 64-bit virtual address space |
| SYS$CRMPSC | Create a memory section |
| SYS$CRMPSC_GFILE_64 | Creates and maps a 64-bit global file section |
| SYS$DACEFC | Deallocate event flag cluster |
| SYS$DALLOC | Deallocates a previously allocated resource |
| SYS$DASSGN | Deassigns a system resource |
| SYS$DCLAST | Declares the last system call in a sequence |
| SYS$DCLEXH | Declares an exception handling routine |
| SYS$DELETE | Deletes a file or system object |
| SYS$DELETE_REGION_64 | Deletes a 64-bit memory region |
| SYS$DELLNM | Deletes a logical name from the system |
| SYS$DELLOG | Deletes a logical definition |
| SYS$DELMBX | Deletes a mailbox device |
| SYS$DELPRC | Deletes a process from the system |
| SYS$DELTVA | Deletes a virtual address space allocation |
| SYS$DELTVA_64 | Deletes a 64-bit virtual address allocation |
| SYS$DEQ | Dequeues a lock request |
| SYS$DEQW | Dequeues a lock request and waits for completion |
| SYS$DGBLSC | Deletes a global section |
| SYS$DISCONNECT | Disconnects a process from a session |
| SYS$DISMOU | Dismounts a disk volume |
| SYS$DISPLAY | Displays system or process information |
| SYS$DLCEFC | Declares an exception flag condition |
| SYS$END_RU | Ends a recovery unit transaction |
| SYS$END_TRANSW | Ends a transaction with wait synchronization |
| SYS$ENQ | Enqueue a lock request |
| SYS$ENQW | Enqueue lock with wait |
| SYS$ERASE | Erase a file |
| SYS$EXIT | Exit current process |
| SYS$EXPREG | Expand register space |
| SYS$EXTEND | Extend file or region |
| SYS$FAO | Format and output a string |
| SYS$FAOL | Format output with logging |
| SYS$FILESCAN | Scan file for attributes |
| SYS$FIND | Find a file or record |
| SYS$FIND_HELD | Find held resource |
| SYS$FLUSH | Flush buffers |
| SYS$FORCEX | Force exit of process |
| SYS$FREE | Free allocated resource |
| SYS$FREELIST | Frees allocated list structures |
| SYS$GET | Retrieve system information |
| SYS$GET_REGION_INFO | Retrieves information about memory regions |
| SYS$GET_SECURITY | Retrieves security attributes of an object |
| SYS$GETCHN | Get channel number |
| SYS$GETDVI | Get device information |
| SYS$GETDVIW | Get device info with wait |
| SYS$GETJPI | Get job/process info |
| SYS$GETJPIW | Get job info with wait |
| SYS$GETLKI | Get lock information |
| SYS$GETLKIW | Get lock info with wait |
| SYS$GETMSG | Retrieve system message |
| SYS$GETQUI | Get queue information |
| SYS$GETQUIW | Get queue info with wait |
| SYS$GETRMI | Retrieves resource management information |
| SYS$GETSYI | Get system information |
| SYS$GETSYIW | Get system info with wait |
| SYS$GETTIM | Retrieve system time |
| SYS$GETUAI | Get user account info |
| SYS$HIBER | Put process in hibernation |
| SYS$IDTOASC | Convert ID to ASCII |
| SYS$LCKPAG | Lock page in memory |
| SYS$MGBLSC | Manage global section |
| SYS$MGBLSC_64 | Manages a 64-bit global section |
| SYS$MOUNT | Mount a disk or volume |
| SYS$NUMTIM | Convert number to time |
| SYS$OPEN | Open a file or device |
| SYS$PARSE | Parse file specification |
| SYS$PROCESS_SCAN | Scans and retrieves process information |
| SYS$PUT | Write system data |
| SYS$PUTMSG | Send a system message |
| SYS$QIO | Queue an I/O request |
| SYS$QIOW | Queue I/O with wait |
| SYS$READ | Read data from device |
| SYS$READEF | Read event flag |
| SYS$RELEASE | Release a resource |
| SYS$RENAME | Rename a file |
| SYS$RESUME | Resume a process |
| SYS$REWIND | Rewind a device |
| SYS$RUNDOWN | Handles process rundown operations |
| SYS$SCHDWK | Schedule a work request |
| SYS$SEARCH | Search for a file |
| SYS$SELECT_CHAN | Select I/O channel |
| SYS$SET_RESOURCE_DOMAIN | Sets the resource domain for a process |
| SYS$SET_SECURITY | Sets security attributes for an object |
| SYS$SETAST | Set AST state |
| SYS$SETDDIR | Set default directory |
| SYS$SETDFPROT | Sets default protection attributes |
| SYS$SETEF | Set event flag |
| SYS$SETIME | Set system time |
| SYS$SETIMR | Set interval timer |
| SYS$SETPRI | Set process priority |
| SYS$SETPRN | Set print attributes |
| SYS$SETPRV | Set process privileges |
| SYS$SETRWM | Set read/write mode |
| SYS$SETSFM | Set file mask |
| SYS$SNDJBC | Send job control message |
| SYS$SNDJBCW | Send job control with wait |
| SYS$SNDOPR | Send message to operator |
| SYS$SNDSMB | Send message to system mailbox |
| SYS$START_RU | Starts a recovery unit transaction |
| SYS$START_TRANSW | Starts a transaction with wait synchronization |
| SYS$SUSPND | Suspend process execution |
| SYS$SYNCH | Synchronizes a process with another operation |
| SYS$TRNLNM | Translates a logical name |
| SYS$TRNLOG | Translates system log file entries |
| SYS$TRUNCATE | Truncates a file or memory object |
| SYS$UNWIND | Unwinds the call stack after an exception |
| SYS$UPDATE | Updates a file or system resource |
| SYS$UPDSEC | Updates security settings for an object |
| SYS$UPDSEC_64 | Updates 64-bit security settings |
| SYS$UPDSEC_64W | Updates 64-bit security settings with wait |
| SYS$UPDSECW | Updates security settings with wait synchronization |
| SYS$WAIT | Suspends execution until an event occurs |
| SYS$WAITFR | Waits for an event flag to be set |
| SYS$WAKE | Wakes up a suspended process |
| SYS$WFLAND | Waits for a logical AND condition on flags |
| SYS$WFLOR | Waits for a logical OR condition on flags |
| SYS$WRITE | Writes data to a file or device |
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