You're commenting on Hacker News, a news forum run by Y Combinator. I think it's fair to assume the broad HN community knows that YC = Y Combinator, and from th

You're commenting on Hacker News, a news forum run by Y Combinator. I think it's fair to assume the broad HN community knows that YC = Y Combinator, and from there that S20 means Summer 2020, and that batch means the set of startups funded by ycombinator. In that context remote should make sense, but the link explains that part.