One of the most important problems for any company is to develop its human resources. This paper proposes that the human development system at work within NEC corporation be adopted in order to take advantage of interdisciplinary technological fields. NEC aims at training engineers why are not only good in their specializations but who also have a deep knowledge of other neighbouring fields. The company propounds four developments ideals: on-the job development, off-the job development, self-development, and organization development.