The biologist might see DNA as a program, and the cellular machinery as the reader that interprets the program. As with any metaphor, this one has limits.
"The biologist might see DNA as a program, and the cellular machinery as the reader that interprets the program."
Then the question begs, who wrote the program? The program itself?
"As with any metaphor, this one has limits."
Then why do so many tout the "Computer program shows that evolution works" nonsense?