NerdOfPlay

NerdOfPlay t1_je42k02 wrote

Reply to ELI5: How do hotel door electronic locks know your card is valid vs. cancelled if they're not talking to the front desk all the time? by kepler1

For the most part the other comments are correct, however in most of these systems the lock has the ability to store the valid keycards and their expected expiry date. This is in case the server or the network go down, the lock will still work.

When a change is made, like a card is lost and replaced, the 'server' will send the lock the new information. So in a way OP is correct in that the locks aren't constantly talking to 'the front desk.'

BTW many office buildings, warehouses etc use the same systems. They just have much longer expiry dates for pemanent employees.

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NerdOfPlay t1_j520qs2 wrote

Reply to Dilemma: Keep or Sell Large DVD Collection? by Noobzaurs

Why not rip (digitize) them? At 5 GB per DVD ( most will be much less) you could put 200 DVDs on a 1 TB drive. They'll always be there when you want them and they won't take up much space. Also removes the hassle of sorting them, taking them out of their box and loading them in a tray etc.

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NerdOfPlay t1_iu7pyox wrote

Reply to ELI5: Now that Twitter is a private company and is no longer publicly traded, what happens to all the shares that were held by Twitter's former shareholders? Do they just lose all the money they had tied up in Twitter stock? by modern_aftermath

When a public company is sold, it's the shares that are actually being sold. The official offer wouldn't have been for $44B, it would have been for something like $55 per share. The shareholders would have had some sort of vote to approve the deal, and once the sale was complete they would have sold their shares for that price.

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