The HUO-year is a unit of time invented by art critic Jennifer Allen to measure how far in the future a name will be remembered. You get one year for each project, two for an exhibition, seven for an interview, etc. HUO expands to Hans Ulrich Obrist, the curator whose intellectual hyperactivity inspired Allen to write a wry essay predicting that Obrist's omnipresence in the present will guarantee him more future name-recognition than John Cage, even as a performance of the latter's ORGAN2/ASLSP (As Slow As Possible) continues to hum through the year 2639. Obrist racked up a few dozen more HUO-years at the "24-Hour Program on the Concept of Time," as did the event's organizer, Guggenheim chief curator Nancy Spector. With an eye to the future, the entire Program was recorded, and at this moment the Guggenheim's curatorial staff is surely working to label, transcribe, and catalogue those videos for posterity. In the meantime, here's an elliptical and incomplete summary.