calculator programs
i’ve used all of these programs on a ti-86 calculator, and most of them
on a ti-85. i don’t think ti makes those anymore and i’m not sure if
any of their current models can run these programs. all programs are
available for download as as zip file that contains an 85_ or 86_ file
that can be transfered to a calculator with a utility such as connect-85
or the official texas instruments software, or at least they could back
in 1998.

vector ops
nov 1998
math
ti-86

perform more advanced operations on vectors than the ti-86 already does on its own (for calculus iii)

vops.zip
vector ops on ticalc.org

easketch
nov 1998
art
ti-86

an etch-a-sketch program, just for fun

easketch.zip
easketch on ticalc.org

physics alphabet
mar 1998
science
ti-85

look up all the equations from my high school algebra-based physics book

alphabet.zip
physics alphabet on ticalc.org

calculus revolver
jan 1998
math
ti-85

surface area and volumes of solids of revolution

revolver.zip
calculus revolver on ticalc.org

values of all six trigonometry functions when given the coordinates for a point

trig.zip
trig on ticalc.org

chemlemm companion
jan 1998
science
ti-85

does mole conversions and shows its work

clc_r4p.zip
chemlemm companion on ticalc.org

trapezoid method
dec 1997
math
ti-85

approximates the value of an integral using the trapezoid method

trap.zip
trapezoid method on ticalc.org

vector additioner
sep 1997
math
ti-85

basic math on vectors, accepting angles as number of degrees east of north or similar

vectr.zip
vector additioner on ticalc.org

sythetic divider
sep 1997
math
ti-85

performs synthetic division

syndiv.zip
sythetic divider on ticalc.org

graphing statistics
sep 1997
math
ti-85

information on a sine or cosine function

graphing.zip
graphing statistics on ticalc.org

discriminant finder
sep 1997
math
ti-85

find the discriminant of a quadratic equation

dscrm.zip
discriminant finder on ticalc.org