https://www.engadget.com/2008-04-25-npd-releases-home-console-attach-rate-ratios-ps3-not-so-hot.html
NPD releases home console attach rate ratios: PS3 not so hot
Apr 25, 2008 - Uh-oh! It's a stint of bad news for the PS3-lovin' populace. NPD's latest batch of arbitrary data we trust so dearly has listed the current standing of home...
home consoleattach ratenpdreleases
https://www.afterdawn.com/glossary/term.cfm/attach_rate
What means Attach Rate? - AfterDawn
Explanining what the term Attach Rate means, with examples and more information.
attach ratemeansafterdawn