24 Software Reuse
Acronym
| AC | Advisory Circular |
| CAST | Certification Authorities Software Team |
| COTS | commercial off-the-shelf |
| FAA | Federal Aviation Administration |
| PDS | previously developed software |
| PSAC | Plan for Software Aspects of Certification |
| RSC | reusable software component |
| RTOS | real-time operating system |
| SOUP | software of unknown pedigree |
| U.S. | United States |
24.1 Introduction
Software reuse is an important subject because the majority of software projects, at least in the aviation world, are derivatives of existing systems. New or clean-sheet avionics, electrical systems, airframes, and engines are actually rather rare. DO-178C encourages a well organized and disciplined process that not only supports the initial certification and ...
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