MDAC（Microsoft Data Access Components）是微软数据库访问组件，Netpise和许多利用数据库的软件都需要操作系统安装MDAC。很多用户的操作系统中已经存在了MDAC，有些是操作系统内置的、有些是其它应用程序安装的。-MDAC (Microsoft Data Access Components) is a Microsoft database access components, Netpise and many need to use the database

SQLDirect Component Library - set of non-visual Delphi components. These components expand possibilities Delphi Visual Component Library, give you access to data on SQL-servers around BDE or ODBC (if you wish) and support all data-aware components. N