Retail Sales:
OEM - sale of original auto parts;
OE - sale of parts that were manufactured by the same manufacturer as the original parts but may be sold under a different brand or without the car manufacturer's markings;
Aftermarket - sale of analogs, auto parts produced by third-party companies rather than the original car manufacturer. They can serve as alternatives to original parts and are often offered at lower prices, although they may differ in quality and specifications.