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Remington E3 "Multiplier" Desktop Calculator

Remington E3 (Note Lack of [÷] and [.] Keys)

The Remington E3 is an OEM version of the Brother 310 produced by by Brother Industries, Ltd. in Japan. It is identical to the Brother 310 other than the Remington E3 badge beside the display panel, and the Model/Serial number tag. The machine was built by Brother in Japan, and provided to Remington without the model-specific badging and label, with Remington marketing, sellings, and supporting the calculators under the Remington brand. Like the Brother 310, the Remington E3 is a three-function calculator that does not provide a divide function, nor does it support fractional numbers (e.g., there is no decimal point key). The lack of division was a pretty serious handicap for an electronic calculator. It seems the thought behind such a calculators was that a the reduced cost associated with a three-function calculator could sell into extremely cost-sensitive markets such as for home, and very basic business use.

The brains of the machine utilize a three-chip MOS LSI "multiplier" calculator chipset made by Mitsubishi. Whether by design, or an accident(logic flaws in the chipset that caused problems with the division function), this chipset did sell to Japanese calculator makers Brother and Denon. Denon's machine was the Denon DEC-311.

The three Mitsubishi chips, part numbers MA8111, MA8112, and MA8113, are packaged in ceramic flat-pack packaging, with a rectangular package having long gold leads extending out from both long edges of the package. In the Denon calculator, the "higher-end" of these three-function calculators, the chips were retained in complex connectors that supported and connected the packages by the leads. Less-expensive versions, like this machine and the Brother 310 had the chips soldered directly to the circuit board.

With technology advancing so quickly in these times, the notion of selling a "three-function" electronic calculator that could not divide was not a great strategy. With prices for full four-function electronic calculators in free-fall, why would anyone buy a calculator that could not handle fractional numbers, and didn't have the ability to do division, when for literally just a few dollars more, they could buy a full four-function calculator? It seems like the idea behind these machines was more of a marketing gimmick rather than having any real merit. Whatever reason drove the marketing of these rather handicapped chips and calculators, it likely will remain shrouded in the mists of time.