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.
PB (plural PBs) Initialism of peanut butter. (sports) Initialism of personal best. Related terms . SB; WR; Proper noun . PB. Abbreviation of ParaÃ­ba. (Brazilian state) Anagrams . BP, Bp, Bp., bp