In this concluding part of the series on technology of the mind, the essential steps for entering in this field are discussed. Some examples of applications are mentioned, along with their negative counterparts. Just like any other technology, the technology of the mind can be misused, and can have major consequences. Hence, it is highly recommended to take precautions, to have a good control over the lower mental tendencies, and to practice under an experienced master. There is no limit to what these techniques can achieve.