AKA: math matic 808, INSIDE TIPS,
Date of intro: ~1973,
Classification: / Documentation / Instructions,
Related with: AMERICAN CIRCUITRON: 808 (version-1),
Courtesy of: FITZGERALD John,
Info: This booklet explains how to use the handheld electronic calculator.
It performs addition, subtraction, multiplication, and division with positive and negative numbers.
Its illuminated display accepts up to eight digits and shows the eight most significant digits of larger results, along with an overflow indicator.
Calculations:
Worked examples show how to use the [+=] and [-=] keys, enter negative numbers, and carry a displayed result into the next operation.
Decimal and constant modes:
The [.00] setting rounds results to two decimal places for money,
while [F] uses a floating decimal point.
The [K] setting stores a multiplier or divisor for repeated calculations,
such as unit conversions.
Corrections:
[CE] clears the current entry so it can be re-entered without losing earlier steps.
[C] clears the entire calculation.
The booklet also explains how to correct certain operator and decimal-point errors.
Battery and display.
A 14-hour charge provides about eight hours of portable operation.
On battery power, the display goes blank after 45 seconds of inactivity and can be restored by pressing [D]
Original warranty.
The manufacturer offered one year of coverage for defects in materials and workmanship, subject to registration within five days of purchase.