The requirements focussed on the needs of embedded computer applications, and emphasised reliability, maintainability, and efficiency. Notably, they included exception handling facilities, run-time error checking, and parallel computing.
It was concluded that no existing language met these criteria to a sufficient extent, so a contest was called to create a language that would be closer to fulfiling them.
The design which won this contest became the Ada programming language.
The resulting language followed the Steelman requirements closely, though not exactly. It included support for generic programming as a significant extension not envisaged in the requirements.
The Ada 95 revision of the language went beyond the Steelman requirements, targetting general-purpose systems in addition to embedded ones, and adding features supporting object-oriented programming.