I added a real-life engineering report "Two-stage vibration and shock isolation" to our collection of Haskell modules http://www.numeric-quest.com/haskell/ It is a literate Haskell program, but still not entirely finished - I need to produce some generic plots to one of the sections of the report. Consider it a draft - subject to modifications and corrections. We are in the process of analysing data obtained from a shake table, where a physical realization of the model described here have been recently tested. So far, they are in a good agreement with outputs from Haskell program as well as with a more advanced finite element analysis from Ansys. Final conclusions will be later added to this report. This report is being addressed to two audiences: vibration control andgineers and Haskell programmers. I do not anticipate that many of you would be interested in the engineering content of this program, yet you might benefit from its superficial aspects, such as presentation and code reuse. This module imports several other modules published in our collection, such as Roots.lhs, Orthogonals.lhs and Gif.lhs; it might be instructive to see how these modules are used in this program. Jan