A pir file extension is related to the nucleotide sequence file format.
PIR file extension - Nucleotide sequence
What is pir file? How to open pir files?
File type specification:
The pir file extension is used for some specialized biochemistry file format.
A pir file contains saved nucleotide sequence data.
Most likely used in specialized devices or programs, or obsolete format.
This pir 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.