Example with a context (How to Write Doc Comments for the Javadoc Tool):
If you must document implementation-specific behavior, please document it in a separate paragraph with a lead-in phrase that makes it clear it is implementation-specific. If the implementation varies according to platform, then specify "On " at the start of the paragraph.
A few months ago I asked a similar question on this forum and somebody said that it is absolutely necessary that there be an article in front of the noun when you use the expression according to something. So, my question to you is does the way they have it written in that tech article sound totally wrong to you? I think I've seen many situations where the article was omitted. I don't even know what to think.