Somebody know how you can type the Diamond Symbol on the TI89 titanium?
I cannot find it in any symbol list.
Assuming you mean on the calculator, it is in the CHAR menu under the Special submenu: 2ND [CHAR] 4 ALPHA [F] (where [CHAR] is the + key & [F] is the | key)

Alternatively, if you meant on a computer or phone, Wikipedia lists "◆" (U+25C6 "BLACK DIAMOND") as the Unicode equivalent.

Edit: changed capitalization to match the calculator
Thanks Zeroko
Problem Solved
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