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.
Lead(II) chloride (PbCl 2) is an inorganic compound which is a white solid under ambient conditions. It is poorly soluble in water.Lead(II) chloride is one of the most important lead-based reagents. It also occurs naturally in the form of the mineral cotunnite. Pb is used in HCl service even though the PbCl 2 formed is slightly soluble in HCl. 2  Addition of 6â25% of antimony (Sb) increases corrosion resistance. 3  A basic chloride of lead, PbCl 2 Â·Pb(OH) 2, is known as Pattinson's white lead and is used as pigment in white paint.