IBM Corp is trying to mop up all those old Series/1 minis and RTs out there and to get more people using the RS/6000, so it yesterday announced a special offer to US users under which they can have $1,000 off any of the 7012-32H, 7013-520, 7013-53H or 7013-550 RS/6000s. The machine must be ordered by May 29 1992 and must be in by June 30: if you made the switch already, bad luck. Arrangements have been made with Recyclers Consulting Group in New Haven, Connecticut to facilitate pick-up and return of replaced processors to IBM – and they must be in good working order. Terms are the same for RT as for Series/1, but North American Van Lines in Anaheim, California is doing the RT pick-up.