Hi All, the proposed Boost.PQS (Physical Quantities System) library facilitates modelling physical quantities in C++ programs. The Formal Review dates for the review of PQS have now been confirmed... The PQS Formal Review will run from Wednesday 31st of May to Friday 9th of June. pqs_3_1_0 is the Official Boost Review version of PQS. (Please note that pqs_3_1_0 has a bug in one header. This can be either patched according to the latest release notes, "relnotes.txt" available from http://tinyurl.com/7m5l8 or alternatively simply download pqs_3_1_1, which is basically equivalent to pqs_3_1_0, except the bug has been fixed there. Suggestion: Composing a review of the PQS library could be a great way to relax! regards Andy Little