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Ti 89 is described in multiple online sources, as addition to our editors' articles, see section below for printable documents, Ti 89 books and related discussion.

Suggested News Resources

One Reason You Might Still Be Paying $120 for a TI-89 Calculator: Copyright
A story about calculators made the nerd-nostalgia rounds recently: Why are today's teenagers still using TI-83 graphing calculators? The chunky devices are far less powerful than the average smartphone, yet cost $100.
Synthesis of the phorboxazoles—potent, architecturally novel marine natural
(a) Ph3P=CC(CH3)CHO, benzene, heat, 20 h; (b) trans-CH3CH=CHCH3, t-BuOK, n-BuLi, THF, then (+)-(lpc)2BOMe, THF, −70 °C, 6 h; H2O2, NaHCO3, RT, 15 h; (2) NaH, THF, heat, 40 min, then PMBCl, n-Bu4NI, heat, 6 h, 89%; (c) (1) OsO4 (cat.) ....
Today Telecom Italia SpA (ADR) Stock Increases. What To Expect?
The stock of Telecom Italia SpA (ADR) (NYSE:TI) gapped up by $0.01 today and has $14.59 target or 26.
Harper Lee, Author of 'To Kill a Mockingbird,' Dies at 89
Harper Lee, whose first novel, “To Kill a Mockingbird,” about racial injustice in a small Alabama town, sold more than 40 million copies and became one of the most beloved and most taught works of fiction ever written by an American, died on Friday in ...
Students test on Saturday
Note that, the use of the TI-89 is the most common reason students are dismissed from the ACT for prohibited calculator use. Sharing calculators during the test is not permitted, and the test proctor will not provide a calculator.

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