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Why are operating system root directories so messy?

• Just look at Windows, so many different types of files just sitting under the root folder, from applications to logs DLLs and even icons. But then there are also tones of folders less than 1Mb in size with lots of sub folders or simply empty. And there is the system32 folder, which contains like thousands of DLLs and also lots of empty folders. I also hate how there are three folders Local LocalLow and Roaming in AppData, like what's the difference? Is this really necessary? You also have the same thing in Android, so many empty folders and senseless names and stuff. I know they are not meant to be seen or operated on by the user but isn't it just better to keep it more organized? On the contrary, if you look at for example, a game. It's clearly divided into folders containing the binary files, the media files, pre-rendered videos and text based files, usually.

• Answer:

  I cannot answer your doubt pertaining to why Windows design is so messed up. If you take a *NIX based operating system it is very well organized.   The root directory of Ubuntu Linux looks something like bin    dev   initrd.img      lib64       mnt   root  selinux  tmp  vmlinuz boot   etc    lost+found  opt   run   srv      usr  cdrom  home  lib             media       proc  sbin  sys      var That is just an example from my current system. It is very well segregated into binaries(bin), statically linked binaries(sbin), user data(home) ,  temporary  folder(tmp) , co nfigurations(etc) , boot related information (boot), mnt and media non root disks, all the library shared objects(lib), other application software(opt) , logged information(var).  Besides these there are dev for devices, proc for process filesystem, In *nix world every entity is treated as a file, including directories(special files). The abstraction becomes much simpler to understand. All other Unices are similarly organized with a few variations here and there.