ET - Expected Throws of the player including their handicap
NT - Numer of Throws on this thole
HCP - How you are playing compared to your expected "Handicap Course Par" so far
Par - How you are playing compared to the course par so far
Jane is expected to get a par on hole 10.
After 9 holes she is even on her Handicap Course Par, and 1 under the course par.
John is expected to get a bogey on hole 10.
After 9 holes he is playing 1 under his Handicap Course Par, and 3 over the course par.
Jane is in the lead in "Scratch" or "Par"-play, but John is in the lead in "Handicap"-play.