EPOC/Symbian executable

File Format
Name	EPOC/Symbian executable
Ontology	Electronic File Formats Executables EPOC/Symbian executable
Extension(s)	.app, .opx, .opo, .dll

This article describes the standard binary executable formats associated with Psion Series 5, EPOC, and Symbian devices and operating systems. Such files may be distributed in a SIS package.

Formats

Formats include:

Signature	Ext.	Name
79 00 00 10 6c 00 00 10	.app	Application
79 00 00 10 ce 39 00 10	.app	Symbian Application
37 00 00 10 74 00 00 10	.app	OPL Application
79 00 00 10 8d 00 00 10	.dll	DLL
79 00 00 10 5d 00 00 10	.opx	OPL Extensions
37 00 00 10 73 00 00 10	.opo	OPL Object Module

Related formats

• Psion IMG/APP (predecessor format)
• Psion OPO/OPA (predecessor format)

Sample files

• https://telparia.com/fileFormatSamples/executable/epocExecutable/