The identifier "En Sql Server 2008 R2 Standard X86 X64 Ia64 Dvd 521546" refers to a specific release of Microsoft’s relational database management system (RDBMS). This string corresponds to the installation media for the English ("En") version of SQL Server 2008 R2 Standard Edition.
The specific Microsoft part number or volume ID for this release's master image. Core Technical Features En Sql Server 2008 R2 Standard X86 X64 Ia64 Dvd 521546
. Note that Microsoft ended extended support for SQL Server 2008 R2 on July 9, 2019. for this specific version? Product Overview: Microsoft SQL Server 2008 R2 Standard
An incremental but significant update over the original 2008 version, introducing features like PowerPivot Inventariar bases de datos, tamaños, jobs y dependencias
As of this report, SQL Server 2008 R2 has reached its End of Life (EOL). Mainstream Support End: July 2014. Extended Support End: July 9, 2019.
It sounds like you're referencing a specific SQL Server 2008 R2 release (DVD 521546), which includes installers for x86, x64, and IA-64 architectures.