I'm Published. Now What?

—from the PI's desk

We received an inquiry from an undergrad about how to use their co-authorship on applications (edited here for brevity and to maintain anonymity):

I have been working on research projects for a year now. Just this summer I have received a co-authorship on a study. I was wondering, how do I record this information or something along those lines to be used for graduate school applications?

Dear Undergrad In The Lab,

Congratulations on your publication!