The International Ergonomics Association defines its area of study as "the scientific discipline concerned with the understanding of interactions among humans and other elements of a system, and the profession that applies theory, principles, data and methods to design in order to optimize human well-being and overall system performance." We librarian types should be interested in ergonomics, as should all those whose vocations involve repetitive motions.
Erogonomics is listed as a lowest-probability typo, and there are currently 2 occurrences of it in the OhioLink database. So the keystrokes required to correct these errors in your own catalog should pose no threat!
(Ergonomic Glows by ljleavell, from the Stock.XCHNG photo site)