1) Abbreviation in ages 2) Abbreviation with truly 3) Academic pds 4) Age amt 5) Age designation 6) Age meas 7) Anniversary no 8) Calendar meas 9) Calendar refs 10) Century divisions 11) Century divs 12) Century pts 13) College divs 14) Decade divisions 15) Decade divs 16) Decade pts 17) Dozens of months 
years
YRS is an abbreviation for Ysgarth Rules System