noun: Initialism of Portable Document Format. A standard for representing electronic documents, allowing them to be transmitted and reproduced accurately with the same printed layout.
noun: Abbreviation of Parkinson's Disease Foundation.
noun: Abbreviation of People's Defense Force (“armed paramilitary anti-military-rule rebel group in Myanmar”).
noun: Initialism of Portable Document Format. A document in PDF format.
noun: Alternative letter-case form of pdf (“probability density function”)
noun: Abbreviation of people's defence force.
noun: Initialism of probability density function. [(probability theory) Any function whose integral over a set gives the probability that a random variable has a value in that set]
noun: Alternative letter-case form of PDF (“Portable Document Format”)
