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Basics of main memory
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:
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 writes back out to the memory. (Ward 2021)
References
Ward, Brian. 2021. How Linux works. No Starch Press.