Graphing Calculator Innovations  Printable Version + HP Forums (https://archived.hpcalc.org/museumforum) + Forum: HP Museum Forums (https://archived.hpcalc.org/museumforum/forum1.html) + Forum: Old HP Forum Archives (https://archived.hpcalc.org/museumforum/forum2.html) + Thread: Graphing Calculator Innovations (/thread164192.html) 
Graphing Calculator Innovations  Eddie W. Shore  03102010 (I'm not sure I have this 100% right, but here it goes): First Graphing Calculator: Casio 7000G in 1985 First Foldable/Clamshell Calculator: HP 28S. There is one on the market today, Casio fx9860 Slim. First one with Natural Input: HP 48S First one with a Stylus: Casio Classpad 300 First one with a Touchpad: TI nSpire Touchpad First one with "documents": I want to say the HP 38G/39G; I think that was slightly before Casio came out with their eactivity. First one with external backup: HP 48S
First one I ever owned: TI 81 back in 1991  I was in high school. The first HP graphing calculator I owned was the HP 48G in 2000. The first Casio graphing calculator I owned was the fxAlgebra 2 (I think it was 2004).
Re: Graphing Calculator Innovations  Frank Boehm (Germany)  03112010 The 28C was released one year(?) before the 28S. Re: Graphing Calculator Innovations  C.Ret  03112010 Your are right on several points: * HP28C was out nearly one year sooner than HP28S, but due to distribution and logistic facts, HP28S apears only a few months or weeks after the HP28C in many dealer shops ! (Especialy in Europe) * Right in 1982 I own a SHARP PC1211 with CE121 Cassette Interface which I use for external backups on audio tapes. Note that 28 years later, most of these backups are still available and functional.
Re: Graphing Calculator Innovations  Palmer O. Hanson, Jr.  03112010 You should add the first graphing calculator with a color display.
one more thing  Frank Boehm (Germany)  03112010 The first foldable/clamshell calculator dates *way* back too (how could I forget  I have a massive sterling silver encased one <g>): one more thing (2)  Frank Boehm (Germany)  03112010 How could I forget again (since I own both of them, maybe I'm getting old): the first stylusbased calculators are without doubt the Litton Royal II and III: Re: Graphing Calculator Innovations  Eddie W. Shore  03112010 Thanks Palmer, I did forget: Color Graphing: Casio 9850g Series (late 1990s, early 2000s) In addition: the one with backlight (that I know of) Casio 9860g Series (GII, Slim) First one with a Matrix/List Editor: HP 48S
First with 3D Graphing as a feature: TI89 (?) I am truly not sure about this one.
Re: one more thing (2)  Eddie W. Shore  03112010 The Royal Digital III looks like a Price Is Right display. Four digitsdisplay? Wow. They are neat looking calculators, thanks Frank.
Re: Graphing Calculator Innovations  Martin Pinckney  03112010 48SX preceded 48S.
Re: Graphing Calculator Innovations  Marcus von Cube, Germany  03112010 The TI 92 predates the 89. It runs the same software (at least in the "plus" version. Don't know about the plain 92's graphics capabilities.
You could add the first with full alpha keyboard (28C or TI92? No: Sharp PC1210 or Casio FX702P is more probable.) Edited: 11 Mar 2010, 11:53 a.m.
Re: Graphing Calculator Innovations  Xerxes  03112010 The first color graphing calculator was the CFX9800G from early 1990s.
I'am not sure, but probably the FX7500G was the first foldable graphing calculator.
what's so funny about "only" 4 digits?  Frank Boehm (Germany)  03112010 Try this one  with only 3 digits: The Sharp EL120  Palmer O. Hanson, Jr.  03112010 While the EL120 displays three digits at a time it can calculate and display many more. For example, in the reference that you give when 123456789 is entered the user can see three digits at a time, i.e., 123 then 456 and then 789 where the actual displays are +123,, 456 , 789. and the machine does more than in the discussion in the reference. For example, with the A M switch in the A (automatic) position the result of a calculation will be automatically sequenced through the display with a pause of about one second for each part of the answer. The machine can actually calculate up to twelve digits, nine to the left of the decimal point and three to the right of the decimal point. For example, if you multiply 111111.1 times 1111.11 the machine will display +123,, 456 , 645.
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