Transcript Calculatorsx

By Jennifer Holland
 William
Seward Burroughs (1885)
invented the first practical adding and
listing machine
 William W. Hopkins (1901) invented the
Standard (front-runner to the 10-key
machine)
 Today’s 10-key design was introduced by
Oscar J. Sundstrand in 1914
 First handheld calculator designed by TI
in 1966
 Started
by John Carence Karcher and
Eugene McDermott in early 1930
 Firm incorporated as Geophysical
Service, or GSI on May 16, 1930
 1938—GSI begins efforts to separate oil
interests from geophysical exploration
 1945—Honored by Navy for contribution
to war effort
 1951—Name
changed to Texas
Instruments Incorporated; GSI becomes
subsidiary
 Starts geophysics summer program for
college students
 1952—TI-GSI Foundation formed to
support education and community
 1952—TI enters semiconductor business
with purchase of transistor license
 1958—Jack
Kilby invents integrated
circuit
 1961—First “Ethics in the Business of TI”
booklet printed
 1966—First mention of “software”
in annual report
 1956—GSI scholarship fund created
 1959—TI
donates semiconductors kits to
colleges and universities; semiconductor
department works with Lighthouse for
the Blind
 1969—Kilby awarded National Medial of
Science in a ceremony in the East Room
of the White House on February 16
 1973—Eugene McDermott, founder of TI
dies at age 74
 1982—Jack
Kilby inducted into National
Inventor’s Hall of Fame
 1990—TI Foundation funds model Head
Start program
 2000—Jack Kilby awarded Nobel Prize in
physics
 "We
will not let the pursuit of sales, billings,
or profits distort our ethical principles. We
will always place integrity before shipping,
before billings, before profits, before
anything. If it comes down to a choice
between making a desired profit and doing
it right, we don't have a choice. We'll do it
right. We must do it right, in every detail.
Expedient compromises or short-cuts for
near-term gains are not acceptable.
--Jerry Junkins,
Chairman, President, and CEO
http://www.youtube.com/watch?v=CeMv
JcfBDLM
 Allows
you to connect your calculator to
your computer.
 Most often used to capture screens
1.) Graphing: Limacons, rose curves,
circles and lemniscates
 2.)
Graph the piecewise function
f= -x-2, x ≤ -1
x3,
-1≤ x ≥1
1,
x ≥1
A student wonders if tall women tend to date taller
people than do short women. She measures herself,
her sister, and the women in the adjoining dorm rooms.
Then she measures the next person each woman dates
and obtains these data on handout (in inches).
 Based on a scatterplot, do you expect the correlation to
be positive or negative? Near ±1 or not?
 Find the correlation r between the heights of the
women and their dates
 In
what other contexts could calculators
be used in our classrooms?