 One might argue that the situation just described is no different from the moral issues revolving around the production, access, and control of any basic necessity of life. If one party has the privilege of the exclusive production, access, and/or control of some natural resource, then that by necessity prohibits others from using this resource without the consent of the exclusive owner. This is not necessarily so with digital information. Digital information is nonexclusory, meaning we can all, at least theoretically, possess the same digital information without excluding its use from others. This is because copying digital information from one source to another does not require eliminating the previous copy. Unlike a physical object, theoretically, we can all possess the same digital object as it can be copied indefinitely with no loss of fidelity. Since making these copies is often so cheap that it is almost without cost, there is no technical obstacle to the spread of all information as long as there are people willing to copy it and distribute it. Only appeals to morality, or economic justice might prevent the distribution of certain forms of information. For example, digital entertainment media, such as songs or video, has been a recurring battleground as users and producers of the digital media fight to either curtail or extend the free distribution of this material. Therefore, understanding the role of moral values in information technology is indispensable to the design and use of these technologies (Johnson, 1985, Moore, 1985, Nissenbaum, 1998, Spinello, 2001). It should be noted that this entry will not directly address the phenomenological approach to the ethics of information technology since there is a detailed entry on this subject available (see the entry on  phenomenological approaches to ethics and information technology).