how to know the running processes.

Hi can anybody help me regarding this..

i want know the output of ps -ef with explanation.
how can we know the running processess.
this is the output of ps -elf
F S UID PID PPID C PRI NI ADDR SZ WCHAN STIME TTY TIME CMD
19 T root 0 0 0 0 SY ? 0 Dec 12 ? 1:05 sched

can anybody explain the headers?

thank you in advance.

regards
rajesh

See "man ps" for whatever Operating System you are running. The detailed meaning of some of the columns (like "SZ") varies from unix to unix.