As we look down upon PCM from a high level, there are many aspects that need to be understood. There is nothing magical about PCM; it is not performing any function that cannot be done manually or with a strictly paper system. It is simply a digital filing cabinet; no more, no less. Back in time, before the advent of the computer, projects were run with paper, the mail system, and a filing cabinet (two or three or many more file cabinets). These were the information, delivery system, and storage, respectively. Without a computer we still dealt with lots of information. We had to have a means of distributing it and the US Postal Service was the only game in town, and we had to have a way to store this information. The computer age has allowed us to use the computer for all of these requirements. The needs are the same, but the tools are different.
Back when our cavemen friends were building things, they needed to dig a foundation for a building. The only tool they...