This is dependent on which operating system you have. For example, Win95 uses FAT or FAT16, Win 98 uses FAT or FAT32, NTFS is on Win200, XP, Vista, 7 Mac OS X uses HFS+And Linux-based OS's usually...
Primarily because digital systems are more accurate. Additionally, digital technology is replacing older systems with modern devices because digital devices are often much smaller, and require less...