.eia is Excellon data
Key Features: .EIA File Extension
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What is an .EIA file?
The eia file extension is most likely related to Excellon data format. Excellon is widely used to drive CNC drilling and routing machines in electronics manufacturing of printed circuit boards (PCBs).
The eia file extension is also used for Mazatrol, a programming language for Mazak CNC machines. Seems to be similar to Excellon.
It is a variant of the EIA RS-274-C standard.
This eia 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.