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DHRI-Curriculum · Aug 1, 2020 · 83a08c5 · 83a08c5
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 # Filesystem	
 
-A filesystem (or file system) is a set of methods and data structures that an operating system uses to  control how data is stored and retrieved on a disk (such as your computer’s hard drive, or even a USB pen drive). Some operating systems include support for more than one file system. 
+A filesystem (or file system) is a set of methods and data structures that an operating system (e.g., Windows, MacOS, Linux, etc.) uses to  control how data is stored and retrieved on a disk (such as your computer’s hard drive, or even a USB pen drive). Some operating systems include support for more than one file system.