HP Envy 15 Maintenance And Service Manual page 24

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16 Chapter 3 Illustrated parts catalog
Model description
Warranty period
Part Number/Product number (p/n)
This is the number used to locate documents, drivers, and support
for the computer.
This number describes the duration of the warranty period for the
computer.
This number provides specific information about the product's
hardware components. The part number helps a service technician
determine what components and parts are needed.