Training Circular TC 9-72 Communications-Electronics Fundamentals Digital Computers SEPTEMBER 2005 The objective of this training circular (TC) is to describe the basic principles, techniques, and procedures associated with digital computers. This TC covers operational concepts of digital computers along with the hardware, software, and data representation and communications used with digital computers. Check-on-learning questions are included at the end of each chapter. Appendix A (Check-on-Learning Answers) is included to provide answers to the check-on-learning questions from each chapter.