They had been independently developed at Tecgraf in 1992–1993 to add some flexibility into two different projects (both were interactive graphical programs for engineering applications at Petrobras company).
Neid on iseseisvalt arendanud Tecgraf aastatel 1992–1993, lisades paindlikkust kahte projekti (mõlemad olid interaktiivsed graafilised programmid ettevõtte Petrobras rakenduste jaoks).