Northern Telecom Ltd has unveiled a Voice Processing System, which it intends to be the basis for speech recognition applications Northern Telecom offers to the interexchange carrier and private network markets; it also announced its first application of the system in the shape of Automated Operator Services, designed to automate calling applications involving interaction between callers and operators or agents on the company’s DMS-250 digital tandem switching systems: the speaker independent vocabulary is up to 30 spoken words, including the numbers zero to nine, the words yes and no, and words such as collect and credit card common to information services applications; it consists of a personal computer, interface hardware and software, and is $10,000 to $25,000 per port.