Multimedia computer-aided instruction programs (computer-controlled image collections, which include still and motion sequences linked to text, sound, and explanatory graphics) offer a powerful tool for continuing education in radiology, made practical only recently by the increasing speed and power of desktop computers. Besides offering access to immense organized collections of original diagnostic images, both analog and digital, the computer permits an individual user to interact in a manner unique to his or her current level of knowledge. A particularly important strength is the ability of the computer to enable a learner to carry out meaningful self-assessment so that objective, but nonjudgmental, feedback on learning progress is provided to the user, allowing support for different learning speeds and styles.