Axiom is  a general purpose Computer Algebra system. It is useful for research and development of mathematical algorithms. It defines a strongly typed, mathematically correct type hierarchy. It has a programming language and a built-in compiler.
Polybutylene is simply a type of plumbing material that was manufactured between the late 70's and early 90's. It is thought that it was installed in over 6 million homes during that time period.
PBR. Derived from the latin Pasbitinus Bluinus Ribbionus, it is a staple of white trash beverage consumption nation wide. As a noun, it is simple, refering to the midly refreshing Pabst Blue Ribbon Beer. As an adjective, it is being used to describe the people, actions and possesions of those who drink it most.bbreviation for pabst blue ribbon beer, which is simultaneously the best and worst beer ever brewed. it is typically on special at bars for twelve cents a pint. also doubles as a laxative.