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@swyggi

The attach ratio is the ratio of software vs hardware.

I had a new term called "annual attach ratio". This ratio represented the number of games that is purchased by the console owners for the year.

So for example, at the FY end of Mar 2008 - the total PS3 shipped according to Sony was 14.74 million units. The total shipped software units was 57.9 million units.

Therefore, for the FY end Mar 2008, 14.74 million PS3s bought 57.9 million units of software or 3.93 software unit each console.

Note to other readers:

Please do not argue shipped vs sold to consumers. It is not "relevant" in these calculations. Numbers are based on shipped units. Consider that Sony's customers are the distributors and retailers.