Markings on side. Markings on centre hairline. Markings on additional hairlines. 1 - LL / Fold pi / Ln 2 - LL / Trig degree / P LR 3 - LLD / Fold rt10 / Ton L 4 - LLD / Trig decimal / PH 5 - TempC / Cube / Sqrt 6 - TempF / Trig hyper / PT Side. Version US/German. Long/Short.