Asset History Sheet report

Guyz,

I assume this is the right forum for this question ... i'm looking for 'Logic' behind standard columns of 'Asset History Sheet' report... though i simulated few acquisitions/retirements and tried checking the fields in ANLC & ANLP tables, its becoming extremely difficult to find out all values.....

does anyone have similar experience and willing to share the technical specs and logic for fields for all fields ...