Feature  

Description 

Case:  

Color case:  

Black

Color keyboard:  

Beige

Weight:  

Voltage selection:  

Adapter:  

Power consumption:  

Working condition:  

Printed Circuit Boards (PCB's):  

Memories:  

Acoustic Delay Line (2x)

Memories indication:  

Prog. steps:  

42 steps of calculations.

Decimal point handling:  

Rounding:  

Calculation overflow indication:  

Input overflow indication:  

Divide by Zero indication:  

Square root of negative value indication:  

Negative value indication:  

Constant function:  

Calculation speed:  

Auto Power-off:  

Display details:  

Printer:  

Extra features/remarks:  

Two part setup, keyboard-printer and a seperate calculation unit,
connected with a cable.
Constant comma with 4 or 8 decimals for all operations.
2 working registers, 2 storing registers, 1 Constant register.
Speed: Multiplication: 0.3333s, Division: 0.25s, Square Root: 0.5s
The MONROE: 2000 model has up to three times less loading capacity.
DM 6.980 (1969)

Initial price:  

Overall quality rate (1-10):  

OEM-copies:  

Other sources of info:  

The Old Calculator Museum, Vintage Calculators Web Museum, ScienceMag

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