Gregg is not the way to go if you're looking for a shorthand that captures text in the way you would need for programming or science and I don't know of a good shorthand for this [if it wasn't already APL.]

Gregg is very much a "visible" sound system from a time when people just needed to capture the conversations and later expand back into text with the aid of a secretary. That is, if you didn't mutate your shorthand for your own purposes.

That being said, Aaron Hsu's handwriting is beautiful, but not my cup of tea for thinking on paper--my initial reaction to his scanned pages was unpleasant because it wasn't what I was used to from my own hands.

I know teeline. But programming in it seems pretty silly since half the time you are only differentiating the meaning of words using sentence context. I do like the idea of using it for maybe some very basic terms in psuedocode though (if, for, define, class, etc)

perhaps an alphabetic shorthand like keyscript?