Notehand or Shorthand or Both?

I learned my shorthand from a book entitled: 'Gregg Notehand' published in 1960. It doesn't have the same set of brief forms as the simplified version (for example "n" does not stand for 'not' and "t" is not a brief form for 'at') yet it is pre-diamond jubilee. Can anyone tell me the about notehand vs shorthand or is it transitional system?

Thank you.

(by mhakes for everyone)