History LEO(K) Oegstgeest History of the LEO(K), Oegstgeest The first floor of the MEB building was used by the Test and Development Department, the later LEO and the even later LEOK Prof. Jhr. Ir. J. L. W. C. Von Weiler – the pioneer of the Dutch radar developments (1935 – 1972) The early history of the LEO (1950 – 1955) Joining TNO and the merger with the Physics Laboratory (1982 – 1985) Computer history LEOK 1961 – 1974 Computer history LEOK – Ferranti FM1600 Computer history LEOK – Mech LUA Trainer Computer history LEOK – Analog and hybrid computing Computer history: the merger of the LEOK and Physics Laboratory Back