It’s all a matter of communication: if you could describe what you’ve done or what you need done in such a way that a computer can help you find what somebody else wants or has already done, without the high overhead involved in normal transactions and without the high cost of expression yourself very clearly, then that computer or network of computers could perhaps again make possible what smaller societies that had total communication did, only now with computers taking care of the total communication, and also the almost cost-free shipping of the works involved.