A in column 1 indicates that this entire line is a comment.

The table below's third column gives the total sample size studied, and the other columns indicate the percentage observed of the particular haplogroup.

The more advanced type had columns of holes, with the columns indicating place value.

The first two columns indicate the range of taxable income that a taxpayer must have to qualify for a particular tax rate.

The third column indicates the tax rate itself.

This column indicates the year in which they will be barred from seeking re-election.

So in the Babylonian system, the third column indicates the number of 60x60s or 3,600.

Empty columns for Originally Written on/for indicate that the information is not given in the book.

The 'True' column would indicate that I'm still failing.

These simple columns indicate the location of interior courtroom spaces.