This presentation provides a description and report of Dragon Systems large vocabulary natural language, speaker-dependent isolated word recognition systems. Based on stochastic processing, these systems are implemented primarily in software running on a personal computer (PC) or workstation. The only processor used in addition to the host PC microprocessor is a simple 2 MHZ 8-bit processor to assist in the real-time data acquisition of the speech signal. Additional components on a sparsely populated audio board, include an A/D converter or CODEC with some TTL logic for dynamic range/gain control.