Each of his computer criminals was recruited by Alex; that's the only name that Miles knew. Alex. Miles had drawn up a list of minimum qualifications for his 'staff'. He forwarded them to Homosoto, who, Miles guessed, passed them on to the ubiquitous yet invisible Alex. That obviously wasn't his real name, but suitable for conversation. Miles had developed a profile of the various talents he required. One group needed to have excellent programming skills, with a broad range of expertise in operating systems. An operating system is much like English or any other language. It is the O/S that allows the computer to execute its commands. Unless the computer understands the O/S, the computer is deaf dumb and blind. As a child learns to communicate, a computer is imbued with the basic knowledge to permit it to function. It is still essentially stupid, that is, it can't do anything on its own without instructions, but it can understand them when they are given. In order to violate a computer, a thorough understanding of the O/S, or language of the computer is a must. Good programmers learn the most efficient way to get a computer to perform the desired task. There are, as in any field, tricks of the trade. Through experience, a programmer will learn how to fool the computer into doing things it might not be designed to do. By taking advantage of the features of the Operating System, many of them unknown and therefore undocumented by the original designers of the O/S, a computer programmer is able to extract additional performance from the equipment. Similarly, though, such knowledge allows the motivated programmer to bypass critical portions of the Operating System to perform specific jobs and to circumvent any security measures that may be present. For example, in most of the 85,000,000 or so DOS com- puters in the world, it is common knowledge that when you ERASE a file, you really don't erase it. You merely erase the NAME of the file. If a secretary was told to dispose of document from a file cabinet, and she only removed the name of each file, but left the contents remaining in the file drawers, she would cer- tainly have reason to worry for her job. Such is an example of one of the countless security holes that permeate computer land. To take advantage of such glaring omissions, several software companies were formed that allowed users to retrieve 'erased' files.