The Last Question
Here's the audiobook version read by the man himself (and also Spock)
And another, The Last Answer;
<a href="https://hubski.com//pub/266219">Discuss this on Hubski.</a>
Every time I see a post about Asimov I get excited that there's a short story of his I haven't read. Much of the time it's one or both of these. Guess I'll read them again.