Human errors can be of several types. Quite often, when experts speak of the “unintended effects of technology,” what they are referring to are the unexpected things people do with it. Among the ways in which people can complicate the workings of a system are Humans act on their perceptions, which may not be fast enough to keep up: In modern information environments, human perceptions are often too slow to keep up with the equipment. Human perception may be affected by information overload,