What does "sz" mean in ps?

Thu Jan 25 01:54:52 UTC 2007

Sample output

  PID USER     COMMAND             SZ

 3594 daemon   /usr/sbin/atd      473

 3604 dbus     dbus-daemon-1 --   607

15475 dhb0114  csh -c /usr/bin/  1282

15492 dhb0114  /usr/bin/X11/xte  2785

What does the "sz" part mean?

Thanks,

Travis

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