“The last combat action for the analog rangekeepers, at least for the US Navy, was in the 1991 Persian Gulf War[13] when the rangekeepers on the Iowa-class battleships directed their last rounds in combat.”
The Mark 1A Fire Control Computer was an electro-mechanical analog ballistic computer. Sailors would stand around a box 62 inches long, 38 inches wide, and 45 inches high. It weighed as much as a car, about 3125 lb, with the Star Shell Computer Mark 1 adding another 215 lb. It used 115 volts AC, single phase using up to 140 amperes, or 15,000 watts (about the same as 3 houses while using ovens).
No wonder my parents wouldn't let me have a computer in my bedroom when I wuz a kid.