The correct answer is File systemFile systemA file system is a process that manages how and where data on a storage disk, typically a hard disk drive (HDD), is stored, accessed and managed.It is a logical disk component that manages a disk's internal operations as it relates to a computer and is abstract to a human user.Commonly used file systems include File Allocation Table 32 (FAT 32), New Technology File System (NTFS) and Hierarchical File System (HFS).Database A database is a systematic collection of data.They support electronic storage and manipulation of data. Databases make data management easy.Example of Database-An online telephone directory uses a database to store data of people, phone numbers, and other contact details.The electricity service provider uses a database to manage billing, client-related issues, handle fault data, etc.Operating systemAn Operating System (OS) is an interface between a computer user and computer hardware.An operating system is a software that performs all the basic tasks like file management, memory management, process management, handling input and output, and controlling peripheral devices such as disk drives and printers. Operating System (OS) is a type of system software kernel that sits between computer hardware and end-user.It is installed first on a computer to allow devices and applications to be identified and therefore functional.