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.
polybutylene is a type of plastic resin that was used extensively in the manufacture of potable water piping from 1978 until 1995 shell and dupont were two of the primary manufacturers of the polybutylene also known as pb piping and fittingsolybutylene is a type of plastic resin that was used extensively in the manufacture of potable water piping from 1978 until 1995 shell and dupont were two of the primary manufacturers of the polybutylene also known as pb piping and fittings