The STU-I, like its successors sometimes known as a "stew phone", was a secure telephone developed by the U.S. National Security Agency for use by senior U.S. government officials in the 1970s.
![](https://web.archive.org/web/20220612190833im_/https://upload.wikimedia.org/wikipedia/commons/thumb/0/00/STU-I.Young.jpg/220px-STU-I.Young.jpg)
STU-I cabinet with desk set on top. The person talking is U.N. Ambassador Andrew Young, calling from New York City during the Israel-Egypt peace talks in the Carter administration.