| | IBM Archives: 1620 Data Processing System |
 | | The IBM 1620 was a general-purpose, stored-program data processing system for small businesses, research and engineering departments of large companies, and schools requiring solutions to complex problems in the areas of engineering, research, and management science. |
 | | With the 1711 model 2 and 1712 Multiplexer and Terminal Unit connected to the 1620, the computer not only received data from analog measuring devices, but fed results through the 1711/1712 to control processes by closing contacts which completed circuits to the instrumentation for closed-loop process control. |
 | | 1620 symbolic language allowed the programmer to refer to instructions and data in the program by name or other meaningful designation without regard to their location in the machine to facilitate relocating sections of programs, incorporating subroutines, and inserting or deleting instructions. |
| www-03.ibm.com /ibm/history/exhibits/mainframe/mainframe_PP1620.html (1005 words) |