Tandem Computers Inc, Cupertino, has a new 5512 printer, a 400chps Printer Control Language-compatible, heavy-duty serial impact printer for use with all its NonStop and LXN systems: the printer uses a 24-wire dual-column head with graphics resolution of up to 360 by 360 dots per inch, has three switchable printing speeds according to the quality desired, and is available now at $3,500 in the US.