Elliot Hui and colleagues at the University of California, Irvine built a computer from glass and silicone that encodes data using pneumatic pressure instead of electricity.
The researchers sandwiched a 0.25-millimeter (0.009-inch)-thick silicone sheet between two panes of glass etched with tiny channels to conduct liquids for chemical reactions, then perforated the silicone layer to link the channels.
Pressure variations impel liquids through the channels, similar to how voltage changes direct electricity through wires in electronic computer chips.
The researchers coded programs by using different silicone sheets as "punch cards," and inputted data by placing their fingers over designated points to change pressure.
From New Scientist
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