Georgy Obushev (1929-2020) – Doctor of Engineering Sciences (Dr. sc. ing.), Associate Professor of the Faculty of Electricity of the Riga Technical University. >>

Pyotr Odintsov (1891-1968) – a Full Member of  Latvian  Academy of Sciences, an authority in chemical technology of wood material. >>

Boris Oks (1928-2012) – Habilitated Doctor of Engineering, professor of the Riga Technical University. >>

Leonid Orekhov (1930-2007) –  Doctor of Engineriing, Docent of the Riga Technical University. >>

Leonid Osipov (1917-2011) – Professor of Riga the Technical University, Doctor of chemistry (Dr. chem). >>

Sergey Ovsyukov (1941) – Doctor of Engineering (Dr. sc. ing.), Docent of the Riga Polytechnic Institute (from 1990 – Riga Technical University). >>

Nikolai Osmidoff (1850-1938) – professor of the Riga Polytechnik Institute, famous specialisn in electrical engineering.  >>