Atlas R300
Brother Procal 508AY
Casio FX-795P Pocket Computer
Casio PC FX-730P
Konkret 100
Olympia CD60
Privileg LC 10000 Super Timer
Psion 5 MX Pro
Psion 5 MX Pro
Sharp PC-1401
SHARP Pocket Computer PC-1246S
SHARP Pocket Computer PC-1270
SHARP Pocket Computer PC-1403H
SR1 (Schulrechner1)
Texas Instruments SR-10
Texas Instruments TI 1750

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.