versions of ps
--------------

Linux
UID        PID  PPID  C STIME TTY          TIME CMD

BSD
UID   PID  PPID CPU PRI  NI   VSZ   RSS WCHAN   STAT  TT       TIME COMMAND

v6
TTY F S UID   PID PRI ADDR  SZ  WCHAN COMMAND

v7
F S UID   PID  PPID CPU PRI NICE  ADDR  SZ  WCHAN TTY TIME CMD

F         Flags associated with the process.  01: in core; 02:
          system process; 04: locked in core (e.g. for physical
          I/O); 10: being swapped; 20: being traced by another
          process.

S         The state of the process.  0: nonexistent; S: sleeping;
          W: waiting; R: running; I: intermediate; Z: terminated;
          T: stopped.

32v on Vax 11/780

F S UID   PID  PPID CPU PRI NICE   ADDR   SZ   WCHAN  TTY TIME COMMAND
  3 S   0     0     0 204   0   20      d0   4 8000d4ca ?   4:07 swapper
  1 S   0     1     0   0  30   20     138  13 800115c8 ?   0:00 init
  1 S  10    34     1   0  30   20     118  17 800115f8 co  0:00 -sh
  1 R  10    40    34  28  51   20     1bf  28          co  0:01 ps -alx
  1 S   0    26     1   0  40   20     10e  10 80020000 ?   0:00 /etc/update
  1 S   0    17     1   0  28   20     11d  13 80012d68 ?   0:00 init
  1 S   0    18     1   0  28   20     181  13 80012db0 ?   0:00 init
  1 S   0    19     1   0  28   20     173  13 80012df8 ?   0:00 init
  1 S   0    20     1   0  28   20     165  13 80012e40 ?   0:00 init
  1 S   0    21     1   0  28   20     157  13 80012e88 ?   0:00 init
  1 S   0    22     1   0  28   20     149  13 80012ed0 ?   0:00 init
  1 S   0    23     1   0  28   20     13b  13 80012f18 ?   0:00 init
  1 S   0    24     1   0  28   20     1f6  13 80012f60 ?   0:00 init
  1 S   1    25     1   0  40   20     1e3  15 80020000 ?   0:00 /etc/cron


pdp11v
F S    UID   PID  PPID  C PRI NI   ADDR  SZ    WCHAN   STIME   TTY  TIME COMD

Ultrix 3.1
F S UID   PID  PPID CPU PRI NICE   ADDR  SZ  WCHAN TTY TIME CMD

xenix
UID   PID  PPID  C   STIME  TTY   TIME  COMMAND