If a company say manufactures CD players isn't it true that most the parts inside were manufactured separately?

And that many of the things that we buy like CD players cars computers etc. are actually just many things put together by MANY hundreds of companies is this true?If a company say manufactures CD players isn't it true that most the parts inside were manufactured separately?
True. Most any product is the result of many companies. In general, however, the company that does final assembly is given credit as the manufacturer. With cars and trucks in the USA, they must list the percentage of parts from outside the USA. The engine and transmission origins are also listed separately.