.281 is ASM MD86 data
Key Features: .281 File Extension
What is an .281 file?
The 281 file extension is associated with the ASM MD86 file format used by unknown software.
The ASM MD86 format seems to be obsolete product without support from developer, or producer.
This 281 file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.