What is HyperStudio software?

HyperStudio is a HyperCard clone, which appeared only a few years after the release of HyperCard, in 1988. It can be described as a multimedia authoring tool, and it provides relatively simple methods for combining varied media. It has been available for purchase off and on over the years, and is now being marketed as "version 5", which is aimed mostly at an educational market.

-- Wikipedia