Input (grade 13): The use of digital electronics (largely invented by Claude Shannon in 1937) and more flexible programmability were vitally important steps, but defining one point along this road as "the first digital electronic computer" is difficult.
Output (grade 12): The use of digital electronics (largely invented by Claude Shannon in 1937) and more flexible programmability were very important steps. It is difficult to define one point along this road as "the first digital electronic computer".