Different note app / way to store often used formulas / how to start programming

[eried]

(02-22-2014 08:18 AM)debrouxl Wrote:  * its crippled BASIC language, which didn't even exist in the very first Nspire OS versions (yup, TI did the blunder of releasing a non-programmable graphing calculator, though it lasted only for several months), and remains willfully unable to draw pixels on the screen or read individual keys from the keyboard. On its side, the PPL has been there from the beginning, and it shines.

Isn't Lua available for the nspire? (or cas cx?)