Definitions for "retention rate"
Retained earnings divided by total after-tax earnings, expressed as a percentage.
The percentage of customers who remain loyal to a business each year.
The proportion of pupils enrolled in a given school year that continues to be enrolled, whether promoted or not, during the following year.
Keywords:  harbor, safe, revenue
revenue safe harbor
Keywords:  newsgroup, articles, holds, long, news
A retention rate measures how long a news server holds articles from a given newsgroup.