Details:
The CD400 was build for Olympia by a Japanese company. A rather unique design aspect is the usage of an acoustic delay-line memory. This type of memory was shortly in use for this kind of purpose. The keys activate reed-switches. This was a common approach in the early days of electronic calculators.
For its design Olympia received the IF Design Award 1971
Usage:
Addition/subtraction:
Use the “+=” and “-=” key. Using the circled version stores the result in memory.
Multiplication:
Enter 1st number, push the “X”-key, enter the 2nd number, push the “+=” key.
To add the result to memory use the circled “+=” key
Division:
Enter 1st number, push the “:”-key, enter the 2nd number, push the “-=” key.
To add the result to memory use the circled “-=” key
Function of some keys, switches etc.
- “C” + a digit (0 to 9) sets the decimal point.
- “C”clears the input register, “Ca” clears all except memory, “C-circle” clears memory.
- The circled diamond key reads the memory contents and stores it in the input register. It does not clear the memory.
- “K” allows working with a constant: the 2nd number entered becomes the constant.
- “%” supports percentage calculations: enter 1st number, push the “X”-key, enter 2nd number, push the “%” -key, then the “+=” key.
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Serial number:
Built in:
Functions:
Power:
Market-introduction:
Production until:
Price:
0209-10777
Probably mid 1970 (regarding prints on IC’s)
Addition, Subtraction, Multiplication, Division
220V
1970
1972
DM. 2150 in 1971/1972 (Source: Büromaschinen Lexikon)
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