Electronics B3-30 - the second Soviet pocket calculator on liquid crystals after the " Electronics B3-04 ". It was produced since 1978, it was sold at a price of 58 rubles, in 1982 it was sold at a price of 40 rubles. In 1980, graduated with Olympic symbols. The calculator performs four arithmetic operations, extracting the square root and taking percent of the number. The letter “B” in the name means “household appliances”, 3 (namely the three, not the letter “Z”) - calculators (2 denoted a desk clock, 5 - a wristwatch, 7 - a wall clock, etc.), 30 - sequential model number.
- Microcalculator "Electronics B3-30" without built-in batteries;
- Case in the form of a book;
- Element base:
- K145IP14K —— control microcircuit ( microprocessor );
- IZHKTS1-8 / 5 —— the liquid crystal display;
- Display: LCD, contains 8 numeric digits;
- Keyboard: 20 keys, 1 power switch;
- Case: aluminum;
- Consumption: 8 mW.
- Food: 2 accumulators like D-0,06 or from the external adapter
The surviving working copy with Olympic symbols is dated June 1980, and the non working copy is dated May 1982.
As it turned out, this calculator was copied from the western Sharp EL-8020 
- List of Soviet calculators