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In essence the main memory is just a large storage area for a bunch of binary digits. Each slot for a 0 or 1 is called a bit:
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> This is where the running kernal and processes reside - they're just big collections of bits. A CPU is just an operator on memory. It reads its instructions and data from the memory and write back out to the memory. (_How Linux Works: Third Edition_, Brian Ward 2021)
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> This is where the running kernal and processes reside - they're just big collections of bits. A CPU is just an operator on memory. It reads its instructions and data from the memory and write back out to the memory. (Ward 2021)
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## References
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Ward, Brian. 2021. _How Linux works_. No Starch Press.
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# Devices
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Devices pertain to disks and drives that either exist on the motherboard or that are plugged-in.
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Devices pertain to [disks](./Disks.md) and drives that either exist on the motherboard or that are plugged-in.
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Devices are files but they are different from ordinary files. There are two types: **block** and **stream**. Device files reside in the `/dev/` directory.
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