ABS          Returns the absolute value of a numeric expression.
 ACHOICE      Executes a pop-up menu using character string array.
 ACOPY        Copies elements from one array to another.
 ADEL         Deletes an array element.
 ADIR         Fills a series of arrays with file information.
 AFIELDS      Fills a series of arrays with field definitions.
 AFILL        Fills any array with one value.
 AINS         Inserts a new position into an array.
 ALIAS        Returns the alias of a work area.
 ALLTRIM      Removes all leading and trailing spaces.
 ALTD         Executes the Clipper Debugger within a program.
 ASC          Returns the ASCII code value of a character.
 ASCAN        Searches for a specific value within an array.
 ASORT        To sort an array in ascending order.
 AT           Returns the position of a string within another string.
 BIN2I        Converts binary two-byte character string to numeric.
 BIN2L        Converts binary four-byte character string to numeric.
 BIN2W        Converts binary four-byte character string to numeric.
 BOF          Indicates the beginning of a file.
 CDOW         Returns the name of the day of the week from a date value.
 CHR          Returns a character for the specified ASCII code.
 CMONTH       Returns the name of the month from a date value.
 COL          Returns the current column position of the cursor.
 CTOD         Converts a character string to a date value.
 CURDIR       Returns current DOS directory path of specified drive.
 DATE         Returns system date in the form "mm/dd/yy".
 DAY          Returns the numeric value of the day of the month from date.
 DBEDIT       Displays and edits records using browse-style editor.
 DBFILTER     Determines active filter expression in current area.
 DBRELATION   Determines the linking expression of specified relation.
 DBRSELECT    Determines target work area of a specified relation.
 DESCEND      To create and SEEK descending order indexes.
 DELETED      Returns the deletion status of the current record.
 DISKSPACE    Determines available memory on specified disk drive.
 DOSERROR     Determines error number of the last DOS error.
 DOW          Returns a number representing day of the week.
 DTOC         Converts a date value to character string.
 DTOS         Converts a date value to character string format
 EMPTY        Returns true if an expression is blank.
 EOF          Returns true if the end of file is reached.
 ERRORLEVEL   Returns current DOS error level.
 EXP          Calculates number based on natural logarithm.
 FCLOSE       Closes the DOS file corresponding to the specified handle.
 FCOUNT       Returns the number of fields in the current database file.
 FCREATE      Creates a new DOS file or truncates existing file to zero.
 FERROR       Returns the DOS error number after file function terminates.
 FIELD        Returns the name of specified field in current work area.
 FILE         Returns true if a specified filename exists.
 FLOCK        Locks a database file in a network environment.
 FOPEN        Opens a DOS file.
 FOUND        Returns true if previous SEEK, FIND, LOCATE was successful.
 FREAD        Reads characters from a DOS file into character variable.
 FREADSTR     Reads characters from a DOS file.
 FSEEK        Moves the file pointer to new position in a DOS file.
 FWRITE       Writes a buffer variable to a specified DOS file.
 GETE         Retrieve the contents of a DOS environmental variable.
 HARDCR       Replaces soft carriage returns with hard carriage returns.
 HEADER       Determines length of header area of current database file.
 I2BIN        Converts integer to two-byte character string.
 IF/IIF       Provides for conditional processing of expressions.
 INDEXEXT     Returns "NTX" or "NDX" to indicate current type of index.
 INDEXKEY     Returns the key expression of a specified index.
 INDEXORD     Returns the controlling index as a numeric value.
 INKEY        Returns numeric ASCII value of the key pressed.
 INT          Converts any numeric expression into an integer.
 ISALPHA      Returns true if first character in string is alphabetic.
 ISCOLOR      Returns true if a color display is installed.
 ISLOWER      Returns true if first character in string is lowercase.
 ISPRINTER    Determines whether LPT1 is ready.
 ISUPPER      Returns true if first character in string is uppercase.
 L2BIN        Converts integer to four-byte character string.
 LASTKEY      Returns numeric ASCII value of the last key pressed.
 LASTREC/RECCOUNT     Returns number of records in current work area.
 LEN          Returns number of characters in character string.
 LEFT         Extracts characters from left side of character string.
 LOG          Returns natural logarithm of a given number.
 LOWER        Converts upper case characters to lower case.
 LTRIM        Removes leading blanks from a character expression.
 LUPDATE      Determines date that current database was last modified.
 MAX          Returns the greater of two numeric or date expressions.
 MEMOEDIT     Displays and edits memofields and long strings.
 MEMOLINE     Returns formatted line from memofield or character exp.
 MEMOREAD     Returns the specified disk file as a character string.
 MEMORY       Returns the available free pool memory.
 MEMOTRAN     Returns character string with all CRs and LFs replaced.
 MEMOWRIT     Writes character string to specified disk file.
 MIN          Returns the lesser of two numeric or date expressions.
 MLCOUNT      Returns number of lines in a memofield or character exp.
 MLPOS        Returns position of specified line number in memo field.
 MONTH        Returns number representing month from a date variable.
 NETERR       Returns true if network environmental error occurs.
 NETNAME      Returns text of the computer name.
 NEXTKEY      Reads the next keystroke without removing it from buffer.
 PCOL         Returns the current column position on printer.
 PCOUNT       Returns number of actual parameters passed to a function.
 PROCLINE     Returns source code line number of current program.
 PROCNAME     Returns name of current program or procedure.
 PROW         Returns current row position on printer.
 RAT          Searches character string for last instance of a substring.
 READVAR      Returns the name of the current GET/MENU variable.
 READEXIT     Toggles the Uparrow and Dnarrow as READ exit keys.
 READINSERT   Toggle/report current insert mode setting for READs.
 RECNO        Returns the current record number of the current work area.
 RECSIZE      Determines record length of current database file.
 REPLICATE    Repeats a character expression a specified number of times.
 RESTSCREEN   Displays a previously saved screen region.
 RIGHT        Extracts characters from right side of character string.
 RLOCK/LOCK   Attempts to lock the current record.
 ROUND        Returns rounded numbers to specified number of decimals.
 ROW          Returns current screen row location of the cursor.
 RTRIM        Removes trailing blanks from a character expression.
 SAVESCREEN   Saves specified screen region to be redisplayed.
 SCROLL       Uses window coordinates to scroll or blank part of screen.
 SECONDS      Returns system time in seconds and hundredths.
 SELECT       Returns the number of the current work area.
 SETCANCEL    Toggle program termination with Alt-C, on or off.
 SETCOLOR     Determines current or previous color setting.
 SETPRC       Sets PROW() and PCOL() functions to specified values.
 SOUNDEX      Converts character string to soundex form for searching.
 SPACE        Create character string of specified number of spaces.
 SQRT         Returns the square root of a given positive number.
 STR          Converts numeric expression to character string.
 STRTRAN      Searches and replaces within a character string.
 STUFF        To manipulate characters within a character string.
 SUBSTR       Extracts a specified part of a character string.
 TIME         Returns the system time in the format "hh:mm.ss".
 TONE         Sounds speaker for specified tone and duration.
 TRANSFORM    Returns character string with specified picture format.
 TRIM         Removes trailing blanks from a character expression.
 TYPE         Returns data type of variable, expression or field.
 UPDATED      Returns true if last READ changed any data in GETS.
 UPPER        Converts lower case characters to upper case.
 USED         Determines if a database is in USE in current work area.
 VAL          Converts a character string to a number value.
 WORD         Converts numeric arguments from type DOUBLE to type INT.
 YEAR         Returns complete numeric value of the year from a date.