Eight installations built between 2001 and 2007. Each a distinct answer to the same question.

[2001] OP_ERA

[2003] OP_ERA: A Journey

[2004] OP_ERA: Hyperviews

[2004] OP_ERA: Haptic Interface

[2004] OP_ERA: Haptic Wall

[2005] OP_ERA: Sonic Dimension

[2006] OP_ERA: Sonic Interface

[2006-2007] OP_ERA: Haptics for the 5th Dimension