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2. File system - Wikipedia

   en.wikipedia.org/wiki/File_system

   A file system provides a data storage service that allows applications to share mass storage. Without a file system, applications could access the storage in incompatible ways that lead to resource contention, data corruption and data loss .

3. Database - Wikipedia

   en.wikipedia.org/wiki/Database

   In computing, a database is an organized collection of data or a type of data store based on the use of a database management system ( DBMS ), the software that interacts with end users, applications, and the database itself to capture and analyze the data. The DBMS additionally encompasses the core facilities provided to administer the ...

4. Flat-file database - Wikipedia

   en.wikipedia.org/wiki/Flat-file_database

   A flat-file database is a database stored in a file called a flat file. Records follow a uniform format, and there are no structures for indexing or recognizing relationships between records. The file is simple. A flat file can be a plain text file (e.g. csv, txt or tsv ), or a binary file. Relationships can be inferred from the data in the ...

5. PostgreSQL - Wikipedia

   en.wikipedia.org/wiki/PostgreSQL

   PostgreSQL ( / ˈpoʊstɡrɛs ˌkjuː ˈɛl /, POHST-gres kyoo el ), [12] [13] also known as Postgres, is a free and open-source relational database management system (RDBMS) emphasizing extensibility and SQL compliance. PostgreSQL features transactions with atomicity, consistency, isolation, durability ( ACID) properties, automatically updatable views, materialized views, triggers, foreign ...

6. Database storage structures - Wikipedia

   en.wikipedia.org/wiki/Database_storage_structures

   Database storage structures. Database tables and indexes may be stored on disk in one of a number of forms, including ordered/unordered flat files, ISAM, heap files, hash buckets, or B+ trees. Each form has its own particular advantages and disadvantages. The most commonly used forms are B-trees and ISAM. Such forms or structures are one aspect ...

7. Relational database - Wikipedia

   en.wikipedia.org/wiki/Relational_database

   A database management system used to maintain relational databases is a relational database management system ( RDBMS ). Many relational database systems are equipped with the option of using SQL (Structured Query Language) for querying and updating the database.