On 21-Sep-1996 (14:31), Jason Fesler wrote to Lee Kirby:

 JF> And no, there's nothing 'official'.  A few places run
 JF> a program called GUP.  You *must* contact your ISP to find
 JF> out what they want you to do to add/drop areas.  Many
 JF> places are still by *hand* :(

I've since seen another reference to GUP, and have forwarded it to my ISP. =)