The most significant feature of HADES was the incorporation of a procedural language known as SPIEL (Signal Processing Interactive Editing Language) that provided for the creation and customization of specialized analysis procedures that can be stored as text files, edited, etc., and are similar to functions and subroutines in programming languages like C and Fortran.
The most important element of HADES was the incorporation of a procedural language called SPIEL (Signal Processing Interactive Editing Language), which facilitated the creation and customization of specialized analysis procedures that could be stored as text files, edited, and function like functions and subroutines in languages such as C and Fortran.