Elektronika MK-18M

The Elektronika MK-18M (Электро́ника МК-18М) was a scientific calculator manufactured in the Soviet Union. It was released in 1986.

Technical specifications
Source:
 * Display: fluorescent, green color, contains 8 digits + minus sign + error sign
 * Power: 4 x AA batteries or AC adapter (with charging function) with 3-pin connector, power consumption ≤0.7W
 * 20 buttons
 * Case: aluminium + plastic
 * Supported numbers range: ±(10E-7)...±(10E8-1)
 * Size: 170x86.5x27 mm, weighing around 350 grams

Novelty
The Elektronika MK-18M calculator has no new novel functionality. Despite this, the aluminum casing was an improvement from previous models plastic casing. In addition, the model was produced at a Billur (Kirovograd), in contrast to the Elektronica B3-18 and B3-18A models which were manufactured at Angstrem (Zelenograd) and NPO Elektronika (Boguchar, Voronezh Region).