It should not be a surprise to hear that many ten's thousands of applications have been created over the decades that computers have been around. While some of these applications are obsolete due to dependencies on no longer available operating systems, hardware, or both, some of these old applications live on. When we focus on active operating systems, there are still thousands of applications to consider. Some of these applications use the same file format type to store data. However, many employ a proprietary file format optimized for that application and use case.
