Video images can be modified as easily as sound and photographic images. Digitizing and then morphing video-tape images requires considerably more computing resources than does morphing a photographic image, but the basic technology is the same. While such techniques have enhanced the capabilities of movie makers, they have also made it possible to produce altered , even untrue, video-taped versions of reality. Computer technology will continue to increase opportunities to blur our ability to distinguish between natural and artificial experiences. In fact, the point may be reached in the future where legal sanctions will have to be applied to those who deliberately distort images for deceptive purposes.
Most computer errors are really the result of human errors.
Procedural errors also cannot generally be corrected by making changes to software, since they are usually the result of a human either not following prescribed procedures or following procedures that are not correct. Software errors are caused by errors in the programs that make up software packages. Complex software packages almost always contain bugs , but, because such packages undergo thorough tests before they are released, the probability that a particular bug will disrupt the system is generally quite low. Electromechanical failures result when components such as printers, circuit boards, disk drives, etc. Developing and implementing contingency plans that provide for quick recovery from such failures can greatly reduce the costs incurred when they happen.