Control Z, Kill, Emacs, and Resurrections?

[Jerry Bakin]

I'm fairly new to this UNIX stuff, I hope you'll bear with me....  but,

If I "stop" a process with Ctrl-Z, how do I resurrect it?

Also, I am using Gosling's emax under 4.2.  I exit with (exit-emacs).  I
type "emacs" to the shell to get into emacs.

This seems to leave me with gobs and gobs of emacs processes.

Is this normal?  I would think I would only want one?  How do I get into
emacs without creating a new one?

Thanks,

Jerry.