time, which allowed for more accurate research. Fig. 1 shows a typical electropalate from the Reading system.

EPG added significant insight into academic understanding of articulatory phonetics. In the 1960s and 1970s a number of independent individuals and companies recognized EPG's potential for pedagogical and therapeutic applications. Despite the multiple attempts to reverse engineer EPG tools for speech therapy, most companies failed to commercialize EPG effectively. EPG tools remain