1. IBM, founded in 1911, is mainly engaged in computer and related services. In 216, the company obtained 888 patents in the United States, ranking first in the United States for 24 consecutive years.
2. HP, founded in 1939, mainly engaged in information products, printing and imaging systems and computer professional services.
3. Dell is mainly engaged in the production, design and sales of computers, and the production and sales of servers, data storage devices and network devices.
4. Ericsson, founded in 1876, is mainly engaged in mobile communication equipment services.
5. Panasonic is mainly engaged in the production and sales of household appliances and electronic products.
6. Oracle Bone Inscriptions is the largest enterprise software company in the world.