Hard drive

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\f0\fs22 \cf0 \cb2 \expnd0\expndtw0\kerning0 \outl0\strokewidth0 \strokec3 \uc0\u8234 A hard drive records data (text, images, databases, programs) on a rotating magnetic platform. Originally indepent peripherals, a desktop PC will usually have one built in. Ones with larger capacith are available as add-ons that attach to a USB port, the main way peripherals are attached. This is the same technology used in server farms such as the ones Google, Youtube, and Pornhub uses. Theirs are on vertical racks with plug-in tracks of hard drives. (And produce tons of waste heat).\uc0\u8236 \ \uc0\u8236 \ Other tecgnologies have partly replaced magnetic hard drives in consumer products: read-write optical drives (CDs, DVDs, and BluRay discs use this technology), and using RAM circuits (look it up in Wikipedia) to act as memory. These are too expensive for use in servers, but are suitable for consumers who have only a few gigabytes of data.\uc0\u8236 \ \uc0\u8236 \ == Encryption ==\uc0\u8236 \ \uc0\u8236 \ Data on a storage device can be encrypted, that is requiring some kind of password or similar to decode. Encyption is a major military topic. Both sides - as in World War Two - struggle to come with up with an encryption protocol that the other side can not figure out how to decode. Osama bin Laden, by the way, did not use encryption. He used human messengers. If you know where your enemy is, which means you know who he is, you can figure out who sees him and where they came from. Making them talk, if you capture one, is sometimes possible. Check Guantanamo and Abu Ghraib. What Is harder is figuring out whether what he tells you is true - he may know what you want to learn, and makes something up to trybto get you to stop, he may know what you want to know, but tells you a deliberate lie instead, or he tells you the truth, butbyoubhave to distinguish it from everything else he's said\uc0\u8236 \ \uc0\u8236 \ (Uncompleted)\uc0\u8236 \ \uc0\u8236 }