Abstract: Online method, system and software for interactively training a user to use a device. One or more computers are operably programmed and configured to display instruction for using a device, display an interactive graphical simulation of the device, receive user input configuring the device, and display a result of the user configuring the device. In another embodiment, the device automatically is synchronized to a particular segment of the instruction. Instructions for configuring or using the device in a particular manner may be provided to a user, together with an indication as to whether the resulting user configuration is correct (e.g., online exercises, quizzes, examinations, etc.) Online communication may be established between user-trainees and device manufacturers for user support, product feedback, etc. A wide variety of devices and device usages or configurations may be simulated, including but not limited to vehicle diagnostic, electrical, and medical devices and related applications.