NewtonScript is a prototype-based programming language created to write programs for the Newton platform. It is heavily influenced by the Self programming language, but modified to be more suited to needs of mobile and embedded devices.
NewtonScript is an object-oriented programming language developed by Walter Smith for Apple for the Newton OS running on their MessagePad & eMate hardware. It borrows concepts from the Smalltalk, LISP, and Self programming languages with special consideration for a low memory footprint (esp. differential inheritance). In 2003 a NewtonScript interpreter, NEWT/0 was developed by Makoto Nukui allowing for its use on other platforms.
See NewtonScript.org for documentation & development tools.