It says products ASAMA will have multiple products...
Manufacturing has a very broad scope, so it's helpful to approach it by dividing it into fabrication and assembly. Companies can claim to 'manufacture their products', but in reality they are only assembling in-house while the actual fabrication from raw material is supplied by a contract manufacturer. Thus the division is often vague.
Apple is an example of a company that does not manufacture all its own products, rather sources from a contract manufacture like Foxconn. Other Foxconn customs like Dell, HP, and Motorola also source from this manufacturer, so they can be likewise considered big companies that don't manufacture their own products.
With today's global supply chain, the list of companies that DO manufacture their own products is much shorter than those that do not. Tesla Motors, for example, assembles their vehicles and battery banks in the USA, however much of the actual fabrication of vehicle components come from both domestic and international suppliers.
Large companies tend to expand vertically and horizontally to envelope their suppliers, reduce overhead and speed up distribution of product and services.
The distinguishing factor is product or service.
Services include companies in marketing, research, accounting and law to name a few industries.
Companies that act as distributors and wholesalers sell products manufactured by others. Large retailers with chain stores and franchises as well.
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