Which software developed by Pito Salas was purchased by IBM in the 1990's?
Pito Salas: Pito Salas is a Curacaoan-American Cambridge, Massachusetts-based software developer. Pito Salas:  While working with Lotus' Advanced Technology Group in 1986, Salas invented the pivot table, a "next-generation" spreadsheet concept which was released by Lotus in 1989 as Lotus Improv.
i don't know