The specification for "sort" is as specified in the SUS but with the following differences as listed below.
compare according to general numerical value, imply -b
compare (unknown) < JAN < ... < DEC, imply -b
stabilize sort by disabling last resort comparison
use DIRECTORY for temporary files, not $TMPDIR or /tmp
Incompatible with SUS definition. End lines with 0 byte, not newline.
output version information and exit