Automatic telephone number information service - reduces possible errors by using only initial letters of main words in name, address and occupation

摘要

The automatic telephone information service installation has a main index contg. name, address and occupation information for all subscribers. The information is stored in main code or as a concept term, ie. only the first few letters of each main word are stored. The main indices are store e.g. on tape and the indices at the end of each track also stored in an access memory, e.g. a core matrix, as key words. Enquiry information from a subscriber seeking a telephone number is received at a control desk and entered into the system in abbreviated form as an enquiry index to which an enquiry number, control desk number and a format control symbol are added. The enquiry index is compared with the key words.