the ruggedized, Military-specification MIL VAX series. The Hungarian Central Research Institute for Physics (KFKI) produced a series of clones of early VAX models, the TPA-11/540, 560 and 580. The SM 52/12 from Czechoslovakia, developed at VUVT Žilina (today Slovakia) and produced from 1986 at ZVT Banská Bystrica (today Slovakia). The East German VEB Robotron K 1840 (SM 1710) is a clone of the VAX-11/780 and Robotron K 1820 (SM 1720) is a copy of the MicroVAX II. The SM-1700 is a Soviet clone of the VAX-11/730, SM-1702 was a clone of MicroVAX II and SM-1705 was a clone of VAX-11/785. These systems ran a variety of clone operating systems - DEMOS (based on BSD Unix), MOS VP (based on VAX/VMS) or MOS VP RV (based on VAXELN). The NCI-2780 Super-mini, also sold as Taiji-2780, is a clone of the VAX-11/780 developed by North China Institute of Computing Technology in Beijing. Further reading References External links DEC Microprocessors SimH VAX Open source emulator that supports VAX architecture The complete Digital Technical Journals Computer-related introductions in 1977 DEC mainframe computers Minicomputers 32-bit computers