overall: 2.2 cm x 9 cm x 18 cm; 7/8 in x 3 17/32 in x 7 3/32 in
In 1996, Casio released this handheld electronic calculator with a color liquid crystal display. It was one of the first in a series that would remain in production through 2008. The instrument performs calculations, displays graphs and text, and runs programs.
The keyboard has an array of plastic ten digit keys, a decimal point key, four arithmetic function keys, a delete key, an AC (clear all) key, an execute key, and an array of function and symbol keys. These keys take on different meaning if the calculator operates in shift, alphabetic or some other mode. Behind the keyboard is the LCD color display. A mark below the display reads: COLOR POWER GRAPHIC CFX-9850G. A mark above the display reads: CASIO. Another one there reads: 32KB. At the base is a socket for an electrical connection.
The back has a compartment for four AAA batteries and a backup battery. Text above this reads: CASIO (/) RATING: DC6V, #V = 2 SUPPLY 0.06W (/) use BATTERY R03. LR03 (/) OR “AAA” SIZE x 4 CR2032x1 (/) MADE IN CHINA (/) CASIO COMPUTER CO., LTD.
The calculator has a fitted hard plastic cover for the front. A mark on the cover reads: CASIO.
The object once belonged to Andrew M. Gleason (1921–2008), professor of mathematics at Harvard University, who had a long-standing interest in mathematics education as well as mathematical research.
“For those problems without black and white solutions [advertisement],” <I>Mathematics Teacher</I>, vol. 89 #3 (March, 1996), pp. 186–187. This advertisement is for the CFX-9800G.
“Graphing like you’ve never seen it" [advertisement], <I>Mathematics Teaching in the Middle School</I>, vol. 2 #1 (September-October, 1996), unnumbered pages. This advertisement is for the CFX-9850G. Advertisements for the CFX-9850G also appeared in this journal in early 1997.