FileInfo.com - The File Extensions Resource

.EQN File Extension

File Type	WordPerfect Equation
File Format	File
Common?	No
File Description	Equation saved by Corel WordPerfect; created using the Equation editor (EQNEDT32.EXE), which is included with the WordPerfect program.
Program(s) that open eqn files	Windows: Corel WordPerfect

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/eqn