2015 closely resembles the HP 12c Platinum as well, but in a vertical case layout. In 2012, SwissMicros (aka RPN-Calc) introduced a miniature clone named DM-12CC approximating the size of an ID-1 credit card (88 mm × 59 mm × 7 mm). It closely emulates the functionality of the original HP-12C by running the original ROM image in an emulator on an ARM Cortex-M0-based NXP LPC1114 processor. Newer DM12 models since 2013 feature a better keyboard and more RAM (LPC1115). A DM12 Silver Edition in a titanium case is available as well. In February 2016, SwissMicros introduced the DM12L, a version of the calculator about the same size as the original HP-12C. Deviating from the HP original, these calculators feature a dot-matrix display, switchable fonts and clock speeds, and, based on a Silicon Labs CP2102 converter chip, they come with a USB (Mini-B) serial interface to exchange data with a PC etc. for backup purposes (and possibly to communicate with applications like PC-based HP-12C emulators) or to update the firmware. Powering via USB is not supported. References Further reading External links The Calculator That Never Dies HP 12c, Thirty Five Years and Still Going Strong HP-12C and HP-12c Platinum on MyCalcDB (database about 1970s and 1980s pocket calculators) HP-12C emulator in Javascript 12C Sunplus