Record book listings are a type of record keeping that lists important events or accomplishments. They are often used to document firsts, which is a six letter word in this crossword puzzle. Record book listings can be used to track the first time someone has achieved something, such as a first place finish in a race or the first time a goal was reached. They can also be used to document other milestones, such as the first time a person has done something or the first time a certain event has occurred. Record book listings are an important part of documenting history and can be used to track progress over time.