 At the same time, various Unix and Unix-based operating systems dominated technical workstations and departmental servers.The idea of a consistent application environment across heterogeneous environments was compelling to both enterprise customers and software developers.On May 5, 1993, Sun Microsystems announced Windows Application Binary Interface (WABI), a product to run Windows software on Unix, and the Public Windows Interface (PWI) initiative, an effort to standardize a subset of the popular 16-bit Windows APIs.