The IBM 7950, also known as Harvest, was a one of a kind data processing system that IBM built for the NSA. It consisted of an IBM 7030 Stretch computer and the following special peripherials:
... the place of articulation of English alveolars like t, but with the tongue curled back) (t, th, d, dh, n)
Dental (tongue against teeth, like Spanish) (t, th, d, dh, ...