Truth be told, audio search and mining technologies really got their start in the military and government years before they became available for the private sector in 2004, according to Donna Fluss, president of DMG Consulting. For private-sector companies, the significant government interest and investment in audio search and mining "legitimizes the technology," consultant Judith Markowitz notes. If the quality is good enough for the government, it should be good enough for what you want to do with it in your call center. Audio search and mining technologies, therefore, need to be as targeted and high-precision as you can make them. You need to build as large a vocabulary as you can. In government, having a half million words is not uncommon. The typical call center vocabulary, on the other hand, is often less than 50,000 utterances. For most vendors, the biggest area of development is or will be in linking text, video, and audio data.