The term PART OF SASE refers to three components of a SELF-Addressed Stamped Envelope (SASE). ENV is an abbreviation for envelope, which is the first part of a SASE. The second part is SELF, which refers to the SELF-addressed aspect of the envelope. Finally, STAMPED refers to the postage stamp that must be affixed to the envelope in order for it to be sent. Together, these three components make up a SELF-Addressed Stamped Envelope.