THE TI-Nspire
Programmable Calculator

according to:     http://tibasicdev.wikidot.com/nspire

"...the calculator will not accept user input until the program is finished. That defeats the
purpose of programs. If you can't input anything, what use is programing? It happens that the
program accepts input before a program is executed, but not during."

"So, the calculator is terrible at programming. It can't produce graphics or advanced
layouts, and it won't accept input. So what use is programing on an Nspire. Truthfully, if
you want to program, don't get the Nspire. Simply put, there is no real way to work
around these obstacles. However, the regular Nspire comes with an 84+ keypad. It has
all the capabilities of a regular TI-84+. Thing is, even though the calculator has
capabilities of using extreme resolution, the 84+ keypad doesn't utilize it. So it's still not
all that good."

This means that its relevance to gnomonics is limited mainly to its spreadsheet and
graphing abilities. And at $140 or thereabouts, even though this has a good PC interface, this
is perhaps not the best device for such use. When oh when will calculator manufacturers get
input from real world users?
PERSONAL PREFERENCE

In spite of the TI-Nspire hype, and the
HP 35s, my personal preference is still
the
Casio fx9860, in particular, the
spreadsheet, and its cost.