Editing Machine (section)

== Computing machines ==
[[File:Arithmometre%2C designed by Charles Xavier Thomas%2C c. 1820%2C for the four rules of arithmetic%2C manufactured 1866-1870 AD%2C TM10901 - Tekniska museet - Stockholm%2C Sweden - DSC01567.JPG|right|thumb|alt=Arithmometr computing machine|The arithmometre was designed by Charles Xavier Thomas, {{circa|1820}}, for the four rules of arithmetic. It was manufactured 1866–1870 AD and exhibited in the Tekniska museet, Stockholm, Sweden.]]
[[Charles Babbage]] designed machines to tabulate logarithms and other functions in 1837. His [[Difference engine]] can be considered an advanced [[mechanical calculator]] and his [[Analytical Engine]] a forerunner of the modern [[computer]], though none of the larger designs were completed in Babbage's lifetime.

The [[Arithmometer]] and the [[Comptometer]] are mechanical computers that are precursors to [[Computer|modern digital computers]]. Models used to study modern computers are termed [[Finite-state machine|State machine]] and [[Turing machine]].