Decoding serial numbers for Apple product types and manufacturing locations

I have heard and also found somewhere in this community about decoding the serial number with first letter indicating the types of product like M for manufactured, N for replacement etc. Is that the same for other products also?

Someone posted bad info. Those codes not for Macs. The M, N, F, codes are at the of the order number (often mixed up by Apple as model number) of iPhones and iPads. This is a replacement iPad following an Apple battery service:

— If the model number starts with M, it was purchased new from Apple or a major carrier.

— If the model number starts with F, it was refurbished by Apple.

— If the model number starts with P, it was sold as a personalized device with Apple engraving.

— If the model number starts with N, Apple provided it as a replacement device for a device returned for service

Apple has changed serial number structure a number of times over the years. Here are a few two articles that may help answer your question:

Apple Tweaks Serial Number Format (old)

Apple Serial Number Lookup Wiki (old)

Apple Serial Number Format (new)

AFAIK there is nothing official from Apple about this.

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Thanks this is very helpful knowledge