Files with 81 file extension can be found as data files for some ZX Spectrum emulators.
81 file extension - ZX Spectrum emulator data
What is 81 file? How to open 81 files?
File type specification:
The 81 file extension is mainly related to some of the data files used by emulators of Sinclair ZX Spectrum computer popular in the 80's. Most likely some sort of temporary or data file.
This 81 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.
