.$B5 File Extension

ProDOS was the name of two similar operating systems for the Apple II series of personal computers. The original ProDOS, renamed ProDOS 8 in version 1.2, was the last official operating system usable by all Apple II series computers, and was distributed from 1983 to 1993. The other, ProDOS 16, took advantage of the extra capabilities of the 16-bit Apple IIgs, but was short-lived and replaced by GS/OS within a year.

GS/OS is an operating environment developed by Apple Computer for its Apple IIGS personal computer that uses the ProDOS filing system. It provides facilities for accessing the file system, controlling input/output devices, loading and running program files, and a system allowing programs to handle interrupts and signals. GS/OS was included as a component of Apple IIGS System Software versions 4.0 through 6.0.1.

How to open:

Unless there are suggested applications listed below the extension description, that are able to open the system files, there is usually no way to directly open or access system files as their functionality is only as part of the operating system. Any attempts to edit system files is strongly discouraged, as it can cause the system to be corrupted and not work properly.

How to convert:

Unless there are suggested applications listed below the extension description, that are able to convert the system files, there is usually no way to convert system files into any other file format. Any attempts to rename system files is strongly discouraged, as it can cause the system to be corrupted and not work properly.