And we can take these DNA molecules and we can essentially match them up to the DNA found in individuals in our computer database. And that allows us to basically determine exactly what individual was present at that particular crime scene and that can give us insight into whether or not that individual actually committed the crime. Now, factor number five is if we have a collection of different types of DNA molecules or RNA molecules we can use a specific method or two methods. We have southern blotting and we have northern blotting to basically determine exactly what the DNA molecule of interest within that mixture is. And this process is very similar to the process of Western blotting that we spoke about when we discuss proteins, their purification and their structure, and finally, computers. So the fact that we now have computers gives us an ability to basically store and catalog and quickly find any DNA sequence or any RNA sequence that we want to find.