Brian Cryer's Glossary of IT Terms with Links

OEP

OEP

Original Entry Point. Refers to the entry point of a routine (in a machine code or assembler level dump) that was the entry point to a routine before some wrapper was applied to it or some other change which moved the entry point.

For example a virus (or some legitimate code) may change the entry point of a routine so it gets called before the routine and then calls the original entry point.