: IBM (which bought SPSS in 2009) generally no longer provides support or activation for version 16. It is mostly found in legacy lab environments or via older perpetual licenses. Are you trying to

SPSS Statistics 16 is a comprehensive software application designed for statistical analysis, data management, and data visualization. Developed by SPSS Inc., now a part of IBM, this software has been widely used by researchers, analysts, and data scientists across various industries and fields.

—it established many of the core features still used in the software today. Key Features of SPSS 16 Data Management