Shoebox by IBM 1970 Hidden Markov Model 1971 SUR Program by DARPA 1980s IVR by Speechworks 1990s Dragon Dictate 2000s Siri by Siri Voice Search by Google ࣈ ͷԻೝࣝ ୯ޠͷԻೝࣝ ୯ޠͷԻೝࣝ Իೝࣝͷੑೳͷ্ IVRͷىݯ ࿈ଓͨ͠Իೝࣝ Personal Assistantͷىݯ by Nuance Communications