Increased sophistication of the machine apparatus (hardware) signaled the need for the development of a "brain" system (software) to handle and direct the increased number of body functions. Programmers became extremely important as it is their job to develop new programs involving increasingly complicated steps.
隨著硬體科技的進步，「四肢」愈來愈發達；頭腦也就挖空心思，盡可能驅使它做工作。結果軟體工程的發展愈來愈複雜，有時設計師寫的程式要經過多次轉換，才會成為「電腦語言」﹘﹘直接指揮電腦的「1」與「0」信號。