 On this day in 1967, IBM showed off a new method for creating holograms with digital computers. Three researchers from the IBM Scientific Center in Houston, Texas wrote a paper describing how they instructed an IBM System 360 Model 50 computer to calculate the inference patterns that would be created if light waves were actually reflected from a real object. Neither the real object nor actual light waves were required to produce the digital hologram. Instead, the computer used mathematical descriptions of the object and the holographic processes. Using the computer technique, a researcher could reconstruct not only optical holograms, but also ones from the microwave, acoustic, and radio frequency parts of the electromagnetic spectrum. The creation of holograms numerically by a computer opened the possibility of obtaining 3D pictures of objects that only exist in concept rather than in physical reality. The new technique greatly extended the usefulness of holography and engineering and scientific applications. Keep checking back for more moments in IBM's research history.