as entropy has said, i think you're refering to the 80200mm f2.8 one touch.
the difference is that the one touch is zoomed by pushing and pulling the lens, rather than by turning a zoom ring. for more details, see the kenrockwell link. he compares the range of 80-200mm/70-200mm lenses.
One touch is probably the nikon 80-200mm f2.8 one touch push and pull.As entropy_h said, Ken rockwell has a page just one the history of the nikon 70-200mm