Pehr-Georg Scheutz is most known for creating the Differential Engine, the first operational and commercially accessible difference engine. The Difference Engine was first proposed in 1837, but he did not complete it until 1843.
The Differential Engine worked on the principal and computational techniques of Babbage’s difference engine and described, in a relatively non-technical fashion, the working of the machine and Babbage’s concept of mechanical notation.
– The start values of the table in question were calculated manually. – The number wheels in the calculating unit were set at the start values with the help of a special tool.
The machine could handle numbers of 15 digits and tabulate functions with 4 orders of differences (the fourth being constant) and print out results, rounded off to eight digits, on molds from which metal printing plates could be cast.