TRACER was the final piece produced as part of an eight year long collaboration between Robert Rauschenberg and choreographer Paul Taylor.  Beginning in 1954, early in Taylor's career, Rauschenberg created the sets and costumes for the dance company.  Of TRACER, Alistair Macaulay of the New York Times writes, 

It consists of an upended bicycle wheel, which spins by remote control now and then. This is Rauschenberg acting as an heir to Marcel Duchamp, creator of the early ready-made Bicycle Wheel in 1913, showing the anti-utilitarian aspects of the quotidian. Wheels became a Rauschenberg motif. (I assume he was also joking about originality: “Have I invented the wheel?”) TRACER opens with one dancer curled in a ball beside the wheel, but almost all the movement that follows carries on regardless of it. It’s an austere and experimental piece.

David Platzker is an art historian, curator, writer and art dealer. His work centers on art after 1958, with an emphasis on Pop, Fluxus, Minimal, and Conceptual art—what informed those movements and successive generations of artists whose work follows formally and intellectually from these precursors. 

Between 1998 and 2004, Platzker was the Executive Director of the non-profit bookstore Printed Matter.  In 2004, he founded Specific Object, a gallery and think tank dedicated to ephemeral materials of the 1960s forward. From 2013 until February 2017, Platzker was Curator of Drawings and Prints at The Museum of Modern Art, where he co-curated the exhibitions "There Will Never Be Silence: Scoring John Cage’s 4’33" (2014), "Sites of Reason" (2014), "Gilbert & George: The Early Years" (2015), and "Adrian Piper: A Synthesis of Intuitions" (2017), which traveled to the Hammer Museum of Art, Los Angeles, under the title Concepts and Intuitions, 1965–2016 (2018). 

In 2018 Platzker resumed his role of president of Specific Object, contributing essays to the monographs "Charles Gaines : Palm Trees and Other Works" (Hauser & Wirth, 2019); "John Baldessari Catalogue Raisonné: Volume Six: 2011-2019" (Yale University Press, 2021); and "Ed Ruscha: Catalogue Raisonné of the Paintings, Volume Eight" (Steidl/Gagosian Gallery, 2021).