Yep, it's a word ...
taxonomy -- noun (BIOLOGY) = the branch of science concerned with classification, especially of organisms; systematics.

As for fiat currencies, none last forever, and most last less than a century. Considering the long run that the US$ has experienced, its days are numbered, and the end is near.

As for my promise to you to look into a curation trail for ProjectHope, I've been rather busy these past few days, to I have not even been able to think about it. I'll try to reread your directions in your mail this weekend, and try to set up the curation trail.

Cheers!