Abstract: A system is described for improving results of Automatic Speech Recognition (ASR) systems. ASR's typically match patterns of incoming sounds to phonemes associated with sounds in a specified language, then associates phonemes with words. ASR's typically consider combinations of up to three phonemes and up to three words. The limitation to small combinations of phonemes and words is one source of errors in ASR's. The invention described here post processes the output from ASR's. In one embodiment, the method forms long combinations of phonemes and words to improve ASR results. In another embodiment, the method detects errors by finding inconsistencies in the ASR's output and then corrects these errors. Other embodiments correct errors that are phonetically close to the correct words, determines the right list of words from a large expected list of sentences, and further improves recognition where word errors are phonetically close to the correct words.