The venerable Ispell program dates back to 1971 with the most recent update in 2015 [1]. Its Contributors files traces earlier spell checkers back to 1959 [2].

The venerable Ispell program dates back to 1971 with the most recent update in 2015 [1]. Its Contributors files traces earlier spell checkers back to 1959 [2]. [1] https://www.cs.hmc.edu/~geoff/ispell.html https://www.cs.hmc.edu/~geoff/ispell.html [2] http://web.mit.edu/~mkgray/jik/sipbsrc/src/ispell-3.1/Contributors http://web.mit.edu/~mkgray/jik/sipbsrc/src/ispell-3.1/Contri...