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DATAMATH CALCULATOR MUSEUM

CASIO FILM CARD SL-800

Date of introduction:	November 1983	Display technology:	LCD
New price:		Display size:	8
Size:	2.1" x 3.4" x 0.03" 54 x 85 x 0.8 mm³
Weight:	0.4 ounces, 12 grams	Serial No:	4L105A
Batteries:	n.a.	Date of manufacture:
AC-Adapter:		Origin of manufacture:	Japan
Precision:	8	Integrated circuits:
Memories:	1
Program steps:		Courtesy of:	Joerg Woerner

Within the Datamath Calculator Museum you'll notice a lot of credit card sized calculators like the TI-1754, TI-1780, TI-1786, TI-307, Canon LC-7, Casio LC-79, or Toshiba LC-851. All these calculators have two dimensions common: The length and the width. But we never talked about the third dimension, the height or thickness of the calculators.

The Casio FILM CARD SL-800 is the only real credit card sized calculator and matches exactly the ISO 7810 standard. This standard is valid for all credit and debit cards and defines a size of 85mm x 54mm x 0.8mm (3.375" x 2.175" x 0.030").

Squeezing a calculator in such a thin housing is not the easiest job and some limitations are obvious:

• Be sure not to damage the unit by bending or dropping. For example, do not carry it in your hip pocket.
• If any part of the display or its reverse side is touched, it will momentarily discolor, however,
this is not a malfunction but results from the unit's super thinness. Special care should be taken
not to excessive pressure the display or push it with a pointed object in order to prevent malfunctions.
• Note that the unit has small indentations which are a necessary part of the production process.
• Since the unit is composed of precision electronic parts, never attempt to take it apart.

If you have additions to the above article please email: joerg@datamath.org.