Portable Document Format
"In advanced statistics courses, students often need to calculate integrals involving a continuous random variable's pdf."
A standard for representing electronic documents, allowing them to be transmitted and reproduced accurately with the same printed layout.
Initialism of probability density function.
In plain English: A PDF is an electronic file that keeps text and pictures looking exactly the same no matter what device you use to open it.
"I emailed you the report in pdf format so we could review it on our phones."
to convert to PDF format
"Please click the button to pdf your recent document before sending it to the client."
Parkinson's Disease Foundation
"She joined the PDF to find support and resources for her family member living with Parkinson's disease."