uid         UID of process
  euid	      Effective UID of process
  suid	      Saved UID of process
  fuid 	      File UID of process
  gid         GID of process
  egid	      Effective GID of process
  sgid	      Saved GID of process
  fgid 	      File GID of process
  pid         process ID
  ppid        parent process ID
  pgrp        process group
  sess        session ID
  priority    priority of process
  ttynum      tty number of process
  flags       flags of process
  minflt      minor page faults              
  cminflt     child minor page faults        
  majflt      major page faults              
  cmajflt     child major page faults        
  utime       user mode time (microseconds)
  stime       kernel mode time (microseconds)      
  cutime      child utime (microseconds)
  cstime      child stime (microseconds)
  time        user + system time (microseconds)
  ctime       child user + system time (microseconds)
  size        virtual memory size (bytes)
  rss         resident set size (bytes)
  wchan       address of current system call 
  fname       file name
  start       start time (seconds since the epoch)
  pctcpu      percent cpu used since process started
  state       state of process
  pctmem      percent memory
  cmndline    full command line of process
  exec        absolute filename (including path) of executed command
  ttydev      path of process's tty
  cwd         current directory of process

This now correctly gives you microseconds.  Previously all times were actually
in milliseconds even though this file said microseconds.
    -Jason Smith

Though times are now converted to microseconds, they are limited to jiffie
resolution.  A jiffie is 100 Hertz on most platforms, 1024 Hertz on Alpha. 
    -Philip Gwyn