Complex sentence: NewtonScript is also one of the conceptual ancestors (together with Smalltalk, Self, Act1, Lisp and Lua) of a general-purpose programming language called Io implements the same differential inheritance model, which is used in NewtonScript to conserve memory.
Split into simpler sentences: NewtonScript is also one of the conceptual ancestors (together with Smalltalk, Self, Act1, Lisp and Lua) of a general-purpose programming language called Io. The Io language implements the same differential inheritance model, which is used in NewtonScript to conserve memory.