Original vintage broadcasting trade ad for BELL SYSTEM, American Telephone and Telegraph Company and Associated Companies.  Your Amazing Telephone Line.  Because it can carry your voice so well, we've learned it's good for a lot of other uses, too!  Other uses allow doctors to transmit an on the spot electrocardiogram or EKG of the heat from  a patient's home phone.  Another probability is that someday you may pay bills by phone by inserting a special plastic cards into a telephone set that dials automatically, then detail the dollars and cents by pushing numbered Touch Tone buttons.  As its future unfolds, day by day, your telephone line will surely become more personally yours than it is even now, one of your most useful aids.  Old 1965 radio television broadcasting industry advertisement.