Understanding the table header

Hello Reader,

I would like to know/understand how to read the HEADER of tables of the payroll log.

Say for example:

How wud I know what all is the following header of one of the IT tables of the payroll log "A WT WT Text APC1C2C3aBKoReBTAwvTvNUNIT Amt/Unit No. Amount"

Thanks,

Harriss