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I always think of a web server, when it comes to concurrent vs. parallel:

A web server can handle serve many users concurrently, but if they are really served in parallel depends on the number of cores/machines.

Me too.

The funny thing is, I saw this title and though, maybe I should just write a blog post stating how I think of these words, because I find myself always linking to my HN comments defining them. It's a nice surprise when someone beats me to it.

Did you link to an upvote? What does that do?

More like reddit context. The first id is the parent comment/link id, the whole context to show. "#up_{id}" is the targeted comment.