Saving State

[Perry Smith]

I do customer support and I shift from one problem to another problem and then 
back to the first problem.

Is it possible to save the current state of emacs which includes the buffers in 
particular and maybe the "register" values (when I do point-to-register) to a 
file.  Then clear the state, work on a new problem, save the new state at that 
time.  Then be able to go back and restore the first state?

Utopia would each of these states to be saved in its own individual file.

I've been told of a packaged named "windows" that does this but I can't find it 
because the name gets too many hits.

Thank you,
pedz