Confused about Cookies => Why File I/O?

[tim042849]

Hi:
For those of you who don't know me - I've been doing web programming for over 10 years
and using rebol to do so for 6. I have not used cookies with rebol before, but I have used
cookies in python programming.

I've looked at some of the scripts at rebol.org that work with cookies. Therein comes the
confusion because those I've looked at seem to use file I/O. I've run Sunanda's cookie-example.r
and looked at a couple of others. So why use files? Why is it necessary?

Here's an example that I used for a control panel application I use:
Prior to the printing of the content-type, I executed the following:
print "Set-Cookie: email=^"tim@johnsons-web.com^";^/Set-Cookie: password=mypwdhere;"
After the first evaluation, I then commented out the line above.
By probing system/options/cgi I can see that the cookie strings are persisting over multiple
executions of the script - by both "GET" and "POST" methods.

So why are the scripts that I see at rebol.org using File I/O?

My apologies if I'm missing something here. 
Regards
Tim