In 1967, IBM announced the IBM Magnetic Tape Selectric Composer. Documents could be typed and recorded on magnetic tape, and then later played back justified. At the same time, IBM was producing the IBM Magnetic Tape Selectric Typewriter, one of the earliest attempts at turning the regular Selectric typewriter into a word processor.
ad for ibm selectric. Learned to type on this baby ( when I was lucky and got to use the electric!) "sem, sem, sem, space"