There are many physical objects that "record" information. For example, a pond that's fed by a stream will leave a record of sediment deposition over many thousand years that encode the pattern of seasonal change and rainfall. Similarly, DNA is a molecule that records information as well. (I wrote about this in 2018)
Recording information is akin to learning. It is the passive component of learning, anyway--memory. DNA memory is the record of trial and error successes of living things in some environment. It seems likely that the information that's recorded in DNA isn't a simple code, like a binary code or alphabet. Rather it's combinations of molecular machinery rather than symbols or words.
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