How the labels work
The label tells you what kind of source sits behind a number.
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Official: direct figures from a manufacturer’s
investor-relations or business-data publication.
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Secondary: reporting or reference material used
for an older figure that is publicly established but not kept on
a live first-party total page.
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Estimate: a labeled market estimate used when
the platform holder does not offer a direct cumulative figure.
Official sources first
Why some Xbox rows need more context
Microsoft does not publish a comparable lifetime hardware page.
Older Xbox figures therefore come from reporting on public
milestones. Newer Xbox Series totals are labeled as estimates.
Main sources currently used
How corrections are handled
If a better source appears, the number and label should both be
updated. If Nintendo or Sony publish a new official milestone,
that replaces the older number on the site.
Display formatting follows the same rule. If a source only says
“more than 117 million,” the site may show `117.0 M` for
consistency, but it should not imply that Sony published a more
precise decimal figure.
- Do not silently upgrade an estimate to “official.”
- Do not keep a stale explanatory note after the figure changes.
- Do not add a row whose provenance cannot be named clearly.
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Do not treat “widely repeated” as the same as “well sourced.”
Why this page exists
Console sales charts are often reposted without source links or
update dates. This page makes the source visible before the number
gets repeated elsewhere.