Some of you likely remember when you generated a purchase order with an actual piece of paper, a 3-part duplicate - file one in a 3 ring binder, mail or fax the other, and archive the third. This was well before enterprise resource planning (ERP) systems emerged. More of you remember, before eCommerce, when we had to be physically present to buy anything. Investor, author, and Stanford Professor Geoffrey Moore categorized and described these major enterprise software sys
