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brktime - Convert a long integer time into year, month, day, etc.
btoi - Boolean to integer
clktime - Get the clock time
cnvdate - Convert long integer time to date string (short format)
cnvtime - Convert long integer time to time string (long format)
cputime - Get the CPU time consumed by the process
envget[bis] - Get a boolean, integer, or string valued environment variable
erract - Take an error action for a previously posted error
errcode - Get the error code of the posted error
error - Post an error and take an error action
getuid - Get the name of the runtime user of a program
itob - Convert integer to boolean
lpopen - Open the line printer as a file
main - The IRAF Main
onerror - Post a procedure to be executed if error recovery occurs
onexit - Post a procedure to be executed upon process shutdown
oscmd - Send a command to the host operating system
qsort - General quick sort for any data structure
sys_mtime - Mark the time (for timing programs)
sys_ptime - Print the elapsed time since last mark
syserr - Post a system error and take an error action
tsleep - Delay process execution
urand - Uniform random number generator
xwhen - Post an exception handler
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