“Hand-shakes,” “Swimming Pools,” “Veils” and “Rear Views” are just some of the 12,000 subject categories that organize the vast visual archive of the New York Public Library, brought to life in Taryn Simon’s latest body of work, The Picture Collection. Addressing the notion of the catalogue and how it has evolved with the advent of the internet, New York-born Simon’s new photographs reveal the subjective, idiosyncratic and sometimes ambiguous ways in which we classify our world. On the occasion of the series’ recent premiere at John Berggruen Gallery in San Francisco, the photographer—whose bright-burning career has already included a Guggenheim fellowship and monographic exhibitions at London’s Tate Modern, the Whitney Museum in New York and the Neue Nationalgalerie, Berlin—sat down with Pinterest co-founder Evan Sharp. Silicon Valley darling Sharp’s popular website and app allows users to collect and share images, acting as an online counterpart to Simon’s more analogue source in the NYPL. Together the two 21st-century archivists untangle the often arbitrary process of categorization in this original audio slideshow.