Research and development, manufacturing, training, it ended up being fantastically expensive. Remember, this was a highly capable analog computer that had to op

Research and development, manufacturing, training, it ended up being fantastically expensive. Remember, this was a highly capable analog computer that had to operate in a difficult environment and even included a self-destruct feature. http://warfarehistorynetwork.com/daily/wwii/the-norden-bombsight-accurate-beyond-belief/ http://warfarehistorynetwork.com/daily/wwii/the-norden-bombs... > ...the cost of the entire program came to more than $1 billion.