DNA profiling and fingerprinting can be done and database can be maintained because of computer and internet.
Step-by-step explanation:
DNA profiling is the study of DNA and recording the number and types of genes that are present in particular loci of the DNA, which is particular for different individuals, and are recorded for future research and scientific purposes. While DNA finger printing is the unique identity of a particular individual which is 100% proof of a person's identity, and is determined by action of electrophoresis in AgarAgar gel.
These are huge amounts of data that needs to be stored and recorded for future purposes. But storing these data in pen and paper is practically impossible. So development of computer, and the internet supply has actually made it much simpler to record them and store, and to find them in any time without hussle.