What is OpenStep Developer?
Developer is a complete software development environment that enables you to write object-oriented software and graphical user interfaces for that software that run on top of the OpenStep operating system. OpenStep Developer enables you to write/compile software in Objective-C, C++ and ANSI C. OpenStep is written in Objective-C. The Developer environment enables you to compile your code for any or all of the supported machine architectures or OpenStep-compliant systems (NT & Solaris), regardless of the platform you are using for writing code.