Once the various aspects of the friction ridge identification science are fully understood, the key words should be enough to trigger the important issues necessary to describe the scientific basis of friction ridge identification and explain its procedural aspects. The tables in the ridgeology formula can be duplicated on wallet-sized cards and used as a reference, bookmark, or study guide. The ridgeology overview is an excellent tool for review just prior to giving evidence or for training purposes when there is a need to refresh one’s memory.