It is possible that:
* It's a local or specific group abbreviation: It could be a term used within a particular academic department, institution, or research group.
* It's a typo: The acronym may be a misspelling of a more common term used in MLA.
* It's a made-up acronym: The term could be a humorous or informal acronym created by students or faculty.
To determine the meaning of CAPOW in your context, please provide more information about where you encountered it.