Bruce and Marge Brown, "Featherweight Organizer from Handspring," PC Magazine, July, 2002
Jacqueline Emigh, "Psion Launches Series 5 Handheld In US," Newsbytes, June 17, 1997
M. A. Mariner, "Organically speaking," The San Francisco Chronicle, January 19, 1994
After posting this term, reader Ken Gillis wrote in about a different sense:
As an aside to your logophilia item "thumbable", the term has a long history of use in the automotive industry, referring to sealants having the general consistency of modeling clay, Mortite, "Dum-dum" etc., which are applied (very rapidly, by experienced workers) with pressure from the thumb to openings in the coachwork to prevent the wind from whistling through until after the vehicle has left the showroom. The term is often used quite formally, as in the titles of technical specifications for such materials, and has been current for at least the last 30 years and is still in general use.
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