MySQL Object oriented, client/server Relational Database Management System (RDBMS).
  DB The repository for the information you want to store.
  MS A way to manage list of information.
  SQL Structure Query Language. (Statements, which designed to interact whith your database).
  MySQL++ API C++ Aplication Programming Interface. Set of functions for communication with MySQL servers and accessing databases, and set of data types used by those functions.
  C API C Application Programming Interface
  Perl DBI Perl Database Interface
  mysql Command line interactive client program, that lets issue queries and see the result.