The paper should be about Operating Systems Services:
Program execution, I/O operations (can write about I/O structure as well), File System manipulation, Communication, Error Detection, Resource Allocation, Protection, etc.

It’s pretty general. We were not given much instructions sadly though. Just 20% of the paper can be copy/pasted (with quotations) and the format should be as following:
cover page
table of contents
abstract
introduction
…
…
…
conclusion
references