Again, my collection focuses on (but is not limited to) the fine products of the Texas Instruments company. (For pictures of my HP graphing calculators, the HP-28S, HP-38G, and HP-48G, visit my HP Zone.)

**1. TI-80**: The first middle-school graphing calculator.
**2. TI-81**: My (and TI's) first graphing calculator (01991).

**1. TI-82**: Graphing calculator enhanced for statistics use.
**2. TI-83**: Updated TI-82. This one is playing a game called
Turbo Breakout (not very well, though).

**1. TI-83 Plus**: Newest version of the TI-83. Upgradeable with Flash technology. Mine has a nifty red (of course)
cover and is showing here the results of a numerical integration program.
**2. TI-85**: My second graphing calculator (01993) and still my
primary working and teaching machine. A close reading of the screen will reveal
this this calculator breaks the 69! barrier by accepting numbers up to 10^{1000}.

**1. TI-86**: Updated version of the TI-85.
**2. TI-89**: The functionality of the TI-92 in the TI-8x platform.
This particular one is also overhead-projection compatible for easy classroom
use.

**1. TI-73**: TI's second middle grades graphing calculator. This
has some nice statistical capacities as well as full fraction operations.

**2. TI-73 Explorer**: In 02003, the TI-73 was re-released in a merger with
TI's popular line of Explorer calculators for classroom use.

**1.
TI-83+ Silver
Edition**: Introduced in 02001, this calculator is an enhanced TI-83+ with
more memory and a faster processor.**2. TI-83+ Silver Edition Overhead
projector model**: This calculator is equipped for overhead projection and
combines the power of the Silver Edition with the keyboard of the original
TI-83+.

**3. TI-83+ Ultra Violet edition**: This variation on the TI-83+ was sold in
America through Target department stores in 02002. A "Cool Blue" version
had been released through Target in 02001. Functionally, this calculator
is the same as a standard TI-83+.

**TI-84+ Silver
Edition**: In 02004, TI introduced three new graphing calculators, basically
ramped-up versions of earlier models. This one is an enhanced TI-83+ SE
with more memory for applications and a faster processor--also a new shape.

**TI-92**: The first TI calculator with a computer algebra system and 3-D
graphing capacities. I use this one with an overhead projection
panel in the classroom.

**Voyage 200**:
The latest (02002) product from TI, this Personal Learning Tool adds a graphical
interface, clock, and several other new capacities to the TI-92+, while refining and
streamlining the shape somewhat.

**1. Casio fx-7000G**: The first graphing calculator. This one is
showing my favorite function,

f(x) = e^{tan(ln x)}, on the interval
(0,100).**2. Casio fx-7000GA**: Second generation Casio, showing f(x) = e^{tan(ln
x)} on the interval (0,10).
**3. Casio OH-7700G**: A graphing calculator designed for overhead
projection. On permanent loan from the
Albion College Department of
Mathematics.

**
1. fx-7700G**:
The line is extended further, including a more natural set of cursor keys.

**2. CFX-9850G Plus**: A color graphing calculator (one arena where Casio has
taken a lead and not been challenged), this one can display results in blue,
orange, and green, as is seen here with graphs of f(x) = x, g(x) = x^{2},
and h(x) = x^{3}.

__Not
yet pictured__: Casio Color Power Graphic CFX-9850G, TI-83+ Cool Blue Edition,
TI-89 Titanium.

Last revision: 7 March 02005.

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