Hyde (Module)
{ # :metre => 1, :m => 1, :hyde => 1.56, :barleycorn => 0.008467 , :inch => 0.0254 , :feet => 0.3048 , :yard => 0.9144 , :pole => 5.0292 , :chain => 20.1168 , :furlong => 201.168 , :mile => 1609.344 , :league => 4828.032 , }{ :Y => 1e24, :Z => 1e21, :E => 1e18, :P => 1e15, :T => 1e12, :G => 1e9, :M => 1e6, :k => 1e3, :h => 1e2, :da => 1e1, :d => 1e-1, :c => 1e-2, :m => 1e-3, :u => 1e-6, :n => 1e-9, :p => 1e-12, :f => 1e-15, :a => 1e-18, :z => 1e-21, :y => 1e-24, }