This document discusses how internet companies collect vast amounts of personal data on their users. It outlines the types of data collected, such as search queries, email contents, social connections, locations, and interests. It then discusses how these companies could potentially use this knowledge for profit purposes, such as targeted advertising, stock prediction, trend analysis, and monitoring product lifecycles. The document concludes by questioning whether these companies will be able to resist the temptation to use personal data for commercial gain, as they collect increasing amounts of private information.