Pragmatic Semiconductor created one as part of their research work. It continues to work when wrapped around a pen. Flex-RX processor (based on RISC-V architecture) is the world's first 32-bit flexible microprocessor that retains full functionality in a bendable state. It also has some built-in machine learning capabilities. The Flex-RV builds on Pragmatic's previous developments in flexible electronics, namely the FlexPCB (flexible printed circuit board) and FlexIC (flexible integrated circuits) made using IZGO thin-film transistor technology. The processors are less than 80 µm thick including the PCB, consume less than 6 mW of power and offer exceptional flexibility and affordability. Test samples contain 12,600 logic gates and have average and maximum clock speeds of 52 kHz and 60 kHz, respectively.