Figure 1: SVR4 ps(1) Listing Differences

$ ps -elf | head -1
F S      UID   PID  PPID  C PRI NI     ADDR     SZ    WCHAN    STIME TTY      TIME COMD

$ ps -elfj | head -1
F S      UID   PID  PPID  PGID   SID  C PRI NI     ADDR     SZ    WCHAN    STIME TTY      TIME COMD

$ ps -elfc | head -1
F S      UID   PID  PPID  CLS PRI     ADDR     SZ    WCHAN    STIME TTY      TIME COMD

$ ps -elfjc | head -1
F S      UID   PID  PPID  PGID   SID  CLS PRI     ADDR     SZ    WCHAN    STIME TTY      TIME COMD