In IBM Rational's HATS product, you will often see reference to the cursor position, or absolute cursor position. The simple cursor position is simply the row (comma) column number: i.e. 4,67. The absolute cursor position is a single number that is a calculation of the row and position.
The formula is as follows:
[(actual rows-1) * max columns] + actual columns
For example, take a 5250 session with a screen size of 24x80. That's 24 rows, and 80 columns. A field at position 5,40 would have an absolute cursor position of:
[(5-1) * 80] + 40 = 360