Keyboard history - Alternatively Sized Piano Keyboardssmallpianokeyboards.org/keyboard-history/
Piano keyboards used to have narrower keys. Today's keyboard size dates from the1880s, designed to suit concert venues and large-handed male virtuosos. + https://paskpiano.org/about/ via Saintloup
LukeW | Designing for Large Screen Smartphoneslukew.com/ff/entry.asp
LukeW Ideation + Design provides resources for mobile and Web product design and strategy including presentations, workshops, articles, books and more on usability, interaction design and visual design.