R1C1 is even older still. It was first released in 1982 as the the cell addressing for Microsoft Multiplan (so we are talking pre-Excel). Microsoft only later

R1C1 is even older still. It was first released in 1982 as the the cell addressing for Microsoft Multiplan (so we are talking pre-Excel). Microsoft only later adopted A1 formulas to fall in line with VisCal and Lotus 1-2-3.