| RUN_BLANK() | Under construction |
| SAVESCREEN() | Save a screen region for later display |
| SCROLL() | Scroll a screen region up or down, right or left |
| SEARCH() | Search a substring into string by regular expression. |
| SECONDS() | Return the number of seconds elapsed since midnight |
| SELECT() | Determine the work area number of a specified alias |
| SET() | Inspect or change a system setting |
| SETBLINK() | Toggle asterisk (*) interpretation in the SETCOLOR() string between blinking |
| SETCANCEL() | Toggle Alt+C or Ctrl+C and Ctrl+Break as program termination keys |
| SETCOLOR() | Return the current colors and optionally set new colors |
| SETCURSOR() | Set the cursor shape |
| SETKEY() | Assign an action block to a key |
| SETMODE() | Change display mode to a specified number of rows and columns |
| SETPOS() | Move the cursor to a new position |
| SETPRC() | Set PROW() and PCOL() values |
| SLEEP() | Sleep for the specified number of seconds and milliseconds. |
| SOUNDEX() | Convert a character string to "soundex" form |
| SPACE() | Return a string of spaces |
| SPLITGEOM() | Extract array from string. |
| SQRT() | Return the square root of a positive number |
| START() | Start task. |
| STARTPATH() | Returns full path and name of program. |
| STR() | Convert a numeric expression to a character string |
| STR2VAR() | Convert uucode string to data. |
| STRTRAN() | Search and replace characters within a character string or memo field |
| STUFF() | Delete and insert characters in a string |
| SUBSTR() | Extract a substring from a character string |
| SYSCMD() | Run system command. |
| TASKGETMSG() | Get message. |
| TASKID() | Return task identifier. |
| TASKPEEKMSG() | Get message. |
| TASKSENDMSG() | Send message to task. |
| TASKSTART() | Resume all tasks what was stopped. |
| TASKSTOP() | Stop all tasks with the exclusion current task. |
| TCPACCEPT() | Accept a connection on a socket. |
| TCPCLOSE() | Close connection. |
| TCPCONNECT() | Connect with server. |
| TCPLISTEN() | Listen port. |
| TCPREAD() | Read to buffer data from connection. |
| TCPWRITE() | Commit data from buffer to connection. |
| TIME() | Return the system time |
| TONE() | Sound a speaker tone for a specified frequency and duration |
| TRANSFORM() | Convert any value into a formatted character string |
| TRIM() | Remove trailing spaces from a character string |
| TYPE() | Determine the type of an expression |
| ULIMIT() | Set limit to use system resources. |
| UPDATED() | Determine whether a GET changed during a READ |
| UPPER() | Convert lowercase characters to uppercase |
| USED() | Determine whether a database file is in USE |
| USEDRIVER() | Use specified driver. |