Acronym for Permenant Virtual Circuit

A connection-oriented circuit that may be set up by software between any two nodes of a switched network.

and also PolyVinyl Chloride

A plastic composed of 43% of oil products and 57% of salt as raw material.

Therefore it uses less exhaustible raw materials and less energy than any other plastic or many 'classic' materials. This makes it excellent for sustainable development. PVC has an extremely wide range af applications, from toys via (waste) water lines to bloodbags.

Oh oh! I know this one!
<Chemistry>

PVC is basically a long chain of organic molecules. (Organic simply means carbon-based). The molecules have an alcohol group at one end (COOH) and an ammonia (NH2) group at the other

H - N (rest of molecule) - C = O

| | H OH

They join together; the N drops an H and the C drops the OH. These form a water molecule (H20). This type of link is called a peptide bond.

...(rest1) - C - N - (rest2)...

|| O

</Chemistry>
I know you really don't care, but I haven't done this stuff since first year, and it was fun....