There are many people who think that DNA code should not be compared to a computer code. But I think it is actually a Holy Code. People argue that because DNA is more complex than Computer code. But this complexity can be explained in following way. When the first organisms came they only had amino acids for doing all the biological processes so the holy code was very simple. Than with evolution there was need of more complex code to execute more complex biological processes, so RNA came into existence. These new living thing had only RNA as genetic material like RNA virus. Than more evolution and We got new version of Holy Code the DNA. It has happened in billions of years so now I think you can now understand the reason for complexity. The another reason why its complex is because DNA is a code but we cannot understand computer code unless we know the language.