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Associate Professor Stefan Andreev investigated calculator with MOC integral systems in Bulgaria (1969). Before that, calculator used transistors. Prof. Jordan Kasabov presented Bulgarian calculator ELKA 42 in the Osaka Exhibition (1970), that wined gold medal. After that, Bulgaria produced and exported 50 000 pocet calculators to Switzerland.
Professional experience
He was had of the Inovation Department at the Bulgarian Academy of Sciences Institute of Solid State Physics
Scientific Publications
References
Obituary
Как България се нареди до САЩ и Япония в електрониката. Д-р Стефан Андреев, BG now.eu
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