Hills, MarkRivenbark, Stuart W2022-02-102022-02-102021-122021-12-01December 2http://hdl.handle.net/10342/9714The ATLAS language is a legacy language that currently runs on OpenVMS systems. Here, we describe a Windows-based system for re-engineering existing ATLAS applications, transforming them into equivalent C# source code that can be compiled and executed on Windows. ATLAS is used for developing testing programs that interact with avionics systems connected to a test station. ATLAS utilizes automated test equipment to issue commands and interrogate results in response to direct stimulus and signals from the unit under test. Windows-based ATLAS, or WATLAS, is composed of a Rascal-based transpiler, a "pre" and "post" processor, the target environment framework, and a Windows-based CASS Station simulator to execute the transpiled target source code. The thesis also provides an overview of the legacy CASS station and the ATLAS language, motivation for development of WATLAS, and a review of some of the competing technologies in this information technology space. Finally, a working prototype with minimal functionality will demonstrate the viability of this approach.application/pdfenWATLASCASSLEGACY LANGUAGESOPENVMSRASCALMETAPROGRAMMINGCOMPUTER SCIENCEProgramming languages (Electronic computers)ATLAS (Computer program language)Software engineeringMaster's Thesis2022-02-08