sentences:  Originally called the VIM-1 (Versatile Input Monitor), that name was later changed to SYM-1.The SYM-1 was a close copy of the popular MOS Technology KIM-1 system, with which it was compatible to a large extent.Compared to the KIM-1, enhancements included the ability to run on a single +5 volt power supply, an enhanced monitor ROM, three configurable ROM/EPROM sockets, RAM expandable on board to , an RS-232 serial port, and a "high speed" (, the KIM-1 supported about 8 bytes/second) audio cassette storage interface.