Contains papers presented at the CHart 21st annual conference, Theory and Practice, held at the British Academy, London, 10-11 November 2005 and the CHart 22nd annual conference, Fast Forward. Art History, Curation and Practice after Media, held at BIrkbeck, University of London, 9-10 November 2006.

Aesthetics and interactive art / Karen Cham -- A blueprint of bacterial life : can a science-art fusion move the boundaries of visual and audio interpretation? / Elaine Shemilt -- Invisible work : the representation of artistic practice in digital visual culture / Ann-Sophie Lehmann -- Mapping outside the frame : interactive and locative art environments / Elizabeth Coulter-Smith / Graham Coulter-Smith -- From UNCAGED to cyber-spatialism / Ralf Nuhn -- When presence-absence becomes pattern-randomness : Blast Theory's Can you see me now? / Maria Chatzichristodoulou -- The digital image and the pleasure principle : the consumption of realism in the age of simulation / Hamid van Koten -- Digital archiving as an art practice / Dew Harrison -- Preservation of net art in museums / Anne Laforet -- Abstracts -- CHArt - computers and the history of art -- Guidelines for submitting papers for the CHArt yearbook.