Please refer to the HN guidelines, which you can reach by clicking "Guidelines" at the bottom of every page: On-Topic: Anything that good hackers would find in

Please refer to the HN guidelines, which you can reach by clicking "Guidelines" at the bottom of every page: On-Topic: Anything that good hackers would find interesting. That includes more than hacking and startups. If you had to reduce it to a sentence, the answer might be: anything that gratifies one's intellectual curiosity.