keyboard can fit in your pocket

Scientists have developed an inexpensive ,flexible keyboard that can be crumpled up and tucked in a pocket without damaging it.
Bendable portable keyboards for use with computers and other devices are already on the market,but they have limited flexibilty,and they are fairly sizable when rolled up for transport.
Researchers including those from sejong University from south korea wanted to develop a keyboard that could withstan the rigors of eveyday life,including folding and harrsh crumpling.
The team developed on a sensor sheet they had previously developed.Here they used a sheet of soft silicone rubber embedded with conductive carbon nanotubes that respond to the push of a finger by changing electrical resistance.
They state that their keyboard price at just $1 worked perfectly and outperformered all existing portable keypads in terms of functionality, flexiility disposability and cost.