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The ELSI 160 was the executive\'s symbol of achievement in the 1970\'s. To have one on your desk demonstrated optimism and confidence to anyone dealing with you. These are a piece of history and now collector\'s items.
History:Sharp manufactured the 8 digit desktop calculator ELSI - 160.(ELSI stands for Extra Large Scale Integration)It is a masterpiece of Space Again DESIGN in the 1970s.The model name is EL-160.Production is around 1972.The serial number is 1517803.
The outer dimensions of the main body is 29.5 × 17.5 × 9.0 cm.The full panel is gently inclined towards the center, and nine Nixie tubes (8 digits plus one +/-) covered with a green panel are visible behind the display window.The keyboard has a refreshing \"definite\" deep stroke, very easy to push.
It is distinctive that the keys of x and ÷ are common.An unusual keyboard arrangement is used to minimize the number of keys on the keyboard, by combining the multiply and divide functions onto one key. To multiply, the first number is entered, followed by the [X÷] key (note the red ÷ symbol), then the second number is typed in, followed by the [+=] key to calculate the product. The same sequence is used for division, but rather than pressing the [+=] key to complete the operation, the red [-=] key is pressed to generate the result.
The EL-160 provides three keys for controlling the memory register, along with the [M/D] key, which is a push-on/push-off switch which controls the mode of the memory function keys. When the [M/D] key is in the up position (\"M\"), the memory function keys operate as expected, with [M+] adding the content of the display to the memory register, the [MR] key recalling the content of the memory register to the display, and the [CM] key clearing the memory register. When the [M/D] key is in the depressed position, double precision mode is engaged, and the memory register is redefined to serve as storage for the least significant eight digits of a double precision result, allowing results of multiplication operations to return answers up to 16 significant digits in length. In this mode, when a result is greater than 8 significant digits, the display shows the upper eight significant digits of the result upon completion of the calculation. The [MR] key can then be pressed to display the lower eight digits of the result. When the lowest digits are being displayed, a single press of the [C] key will return the upper-most digits of the answer to the display. In double precision mode, the [M+] key is disabled. Double precision mode is good only for use on single calculations...chain calculations in this mode result in the low part of the answer being lost. When in double precision mode, the [CM] key simply clears the storage register that contains the lowest eight digits of results.
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