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| SR1 (Schulrechner1) | | VEB Mikroelektronik "Wilhelm Pieck" Mühlhausen , 1984 | Non-programmable floating-point calculator with exponential representation.
Uses infix notation with precedence calculation, does not provide parentheses, and has no statistics functions.
Storage space included.
Special fractional calculation modes or complex numbers are not possible.
The buttons and are combined into the (modal) button , which is to be pressed once or twice, depending on the function.
| | SR1 was widely implemented in regular and polytechnic secondary schools in 1984/85 and 1985/86. It replaced the slide rule, which was used before. This device can work with the first accumulator for 25 years without recharging. When the product was launched, it’s price was 123 German Marks. | | |
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