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2. Key–value database - Wikipedia

   en.wikipedia.org/wiki/Key–value_database

   A tabular data card proposed for Babbage's Analytical Engine showing a key–value pair, in this instance a number and its base-ten logarithm. A key–value database, or key–value store, is a data storage paradigm designed for storing, retrieving, and managing associative arrays, and a data structure more commonly known today as a dictionary or hash table.

3. File system - Wikipedia

   en.wikipedia.org/wiki/File_system

   A local file system manages storage space to provide a level of reliability and efficiency. Generally, it allocates storage device space in a granular manner, usually multiple physical units (i.e. bytes). For example, in Apple DOS of the early 1980s, 256-byte sectors on 140 kilobyte floppy disk used a track/sector map. [citation needed]

4. Database storage structures - Wikipedia

   en.wikipedia.org/wiki/Database_storage_structures

   Ordered storage typically stores the records in order and may have to rearrange or increase the file size when a new record is inserted, resulting in lower insertion efficiency. However, ordered storage provides more efficient retrieval as the records are pre-sorted, resulting in a complexity of O ( log ⁡ n ) {\displaystyle O\left(\log n ...

5. Directory (computing) - Wikipedia

   en.wikipedia.org/wiki/Directory_(computing)

   On many computers, directories are known as folders, or drawers, [1] analogous to a workbench or the traditional office filing cabinet. The name derives from books like a telephone directory that lists the phone numbers of all the people living in a certain area.

6. Lightning Memory-Mapped Database - Wikipedia

   en.wikipedia.org/wiki/Lightning_Memory-Mapped...

   Free and open-source software portal; Lightning Memory-Mapped Database (LMDB) is an embedded transactional database in the form of a key-value store.LMDB is written in C with API bindings for several programming languages.

7. Disk sector - Wikipedia

   en.wikipedia.org/wiki/Disk_sector

   In computer disk storage, a sector is a subdivision of a track on a magnetic disk or optical disc. For most disks, each sector stores a fixed amount of user-accessible data, traditionally 512 bytes for hard disk drives (HDDs), and 2048 bytes for CD-ROMs , DVD-ROMs and BD-ROMs . [ 1 ]