Can I do this with RSForm Pro:

Have a form with three parts. Each part is filled in by a different person. I want to be able to bring up the form as well (recall later by date to review)

Ideally, I would have three parts and if two of the three parts are filled in the person filling in the third part would see the content already filled in by the other two.

Is there another component I should be using? Technically I would be filling in a form, writing to the database and recalling the partially completed form to fill in more of the fields at a later date.

So I need read / post / edit

I would also be interested in being able to do this?

OK I have found how to do this if they are all using the same machine and the form is a once off event not something they use regularly.

Try this resource: www.rsjoomla.com/blog/view/334-save-and-edit-form.html

If someone does figure how to use this to allow three users on differing machines that would also be helpfull.

The only other solution I can offer, and I am not entirely sure how to do this myself is.
( possible solution to scenario) I suppose the first person can fill out a separate form with a specific database row description result and then when he is finished and submits it could send an email invite to the second person to a different form with a specific database pull to pre-populate fields that the first person filled in, is this possible? If so I would also love to know how to do it?