Answer: Research and development or Read and draw.
Explanation: Research and development, known in Europe as research and technological development, is the set of innovative activities undertaken by corporations or governments in developing new services or products and improving existing ones. ( you can find this on Wiki) Now for school teachers using R&D meaning Read and Draw, another way to get info faster and better, its mostly "Back to Text" though. Hoped this helped! :D
Blood tests, DNA, and fingerprint scanings is better than facial regoniztion because someone can look like another person. But since everyone has a different fingerprint, this can be more efficent.
