Details:
A very early machine using LSI chips. Probably the first using rechargeable batteries making it truly portable.
The display uses rather artistic digits with a kind of half-size zero.
When connected to the charger a switch inside the calculator connector prohibits power to the calculator electronics.
Usage:
Note: Before it can be used it needs two resets using the “C” key.
Addition/subtraction:
As in mechanical calculators using the “+ =” key and “- =” key
Multiplication:
Enter first number, “X :” key, second number, “+ =” key
Division
Enter first number, “X :” key, second number, red “- =” key
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Serial number:
Built in:
Functions:
Power:
Market-introduction:
Production until:
Price:
016690X
1970 (see serial nr. info on http://www.oldcalculatormuseum.com/t-sharpsn)
Addition, Subtraction, Multiplication, Division
6 built-in NiCd cells
1970 (The QT8D, being externaly powered was introduced in 1969)
1971?
Approx. DM. 2250,- in 1970 (Source: Büromaschinen Lexikon)
Mechanical Calculators |
Electronic Calculators |
Typewriters |