From: Dmitry A. Kazakov on
The library provides tools for handling dimensioned values in Ada. Checks
are run-time when not removed by the compiler. String I/O and GTK+ widgets
based on GtkAda included.

http://www.dmitry-kazakov.de/ada/units.htm

Changes to the version 2.9:

1. Output of exact zero values uses power 1 with any small. E.g. 0W is
output as 0�W rather than 0�yW.

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Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de