Presubscribed interexchange carrier, or predesignated interexchange carrier, the long-distance telephone company to which calls from a subscriber line are routed by default
Here the "P" in the "PIC" acronym is often taken to represent words or phrases besides, or in addition to, "plastic". Frequently these are various types of plastic, as the names of many begin with poly-.
This disambiguation page lists articles associated with the title Pic. If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article.