Catalogtree is a multidisciplinary information-focused design studio based in Arnhem (NL) and Berlin (DE). It was founded in 2001 by Daniel Gross and Joris Maltha; Nina Bender joined the studio in 2011. The studio works continuously on commissioned and self initiated projects. Highly interested in self-organising systems they believe in 'Form Equals Behaviour'. Experimental tool-making, programming, typography and the visualization of quantitative data are part of their daily routine.Recent endeavours include bin-packing a book design, etching chladni patterns and auto-detecting helipads in satellite footage of São Paulo. Daniel Gross and Joris Maltha teach at ArtEZInstitute of the Arts in Arnhem (NL) and have taught and lectured widely. The work of Catalogtree is in the collection of the Cooper Hewitt, Smithsonian Museum of Design.