I think I first saw the concept of a 3D spreadsheet in Quattro Pro. The following link seems to confirm this : https://www.kstreetstudio.com/science/sams/qpro

I think I first saw the concept of a 3D spreadsheet in Quattro Pro. The following link seems to confirm this : https://www.kstreetstudio.com/science/sams/qpro/concept.html https://www.kstreetstudio.com/science/sams/qpro/concept.html