sentences:  For the interim, in 1965 an AN/FPS-64 search radar was installed in the former AN/FPS-20A tower; it was removed in 1967 after the AN/FPS-35 was again fully operational.The AN/FPS-90 height-finder radar was removed in 1969.Work proceeded on the installation of BUIC II in 1966, after the installation of a Burroughs CSA-51 computer system, In 1969 it became a BUIC III site.