In addition to the digital computers in the 2nd half, analog computers for naval guns were commonly fielded in the early parts of the 20th century.[1] [1] http

In addition to the digital computers in the 2nd half, analog computers for naval guns were commonly fielded in the early parts of the 20th century.[1] [1] https://en.wikipedia.org/wiki/Rangekeeper https://en.wikipedia.org/wiki/Rangekeeper