Forms Question

Hi, Im trying to figure out the best way to do the following. I need to have a series of forms that when the user finishes the first part of the form he is sent to another page where a second form is filled out, and then a third. Making the forms etc. is no problem, what I'm not sure of is how to keep the data from all forms so it can be displayed at the end. I don't want to have anything written to the users drive, or to the server - so this information would have to be kept in memory. Would an array work in this situation? Any ideas are appreciated. TIA