Those numbers and letters in your DeWalt tool's model number do have meaning, though deciphering them might take the skill of ...

What Is a SIC Code? Standard Industrial Classification (SIC) codes are four-digit numerical codes used to categorize U.S. companies by the industries in which they operate. Companies are required ...

A personal identification number (PIN) is a numerical code used in many electronic financial transactions, providing additional account security.

The numerical solution above ALSO looks EXACTLY like a cosine function. Actually, it's pretty awesome that these two methods give the same numerical values. But they are different, right?

The Legal Entity Identifier (LEI) is a twenty‑character alpha‑numeric code that acts as a passport for companies and organisations taking part in financial transactions.