It seems you may be correct in what was intended:

> The word “code” derives from the Latin codex, meaning “a system of laws.” Today “code” is used in various distinct contexts—computer code, genetic code, cryptologic code (such as Morse code), ethical code, building code, and so forth—each of which has a common feature: They all contain instructions that describe a process.

[from the article's third paragraph]

Yep - I feel the article addressed that point fairly well, explaining where the word code came from, how it is used today, and the specific take on it they used when writing the article.