Microsoft is the originator of computer software development and currently the world's largest computer software supplier. It was founded in 1975 by Bill Gates and Paul Allen. Its main business operations include research and development, manufacturing, licensing and provision of computer software, game consoles, digital players, etc. Its main representative products are Microsoft Windows operating system and Microsoft Office software.

Adobe is the world's leading provider of digital media and online marketing solutions. It was founded in 1982 and is headquartered in San Jose, California, USA. Has many famous representative works, such as Adobe Photoshop, Adobe Audition, Adobe Reader, Adobe Flash, Adobe Dreamweaver, etc.

Ecost is a large electronic products shopping website in the United States. It mainly sells computers, laptops, software, hardware, network products and other electronic products.

Dell Computer is a well-known computer manufacturer and seller in the United States. It was founded in 1984 and is headquartered in Round Rock, Texas, USA. Its main business is the design, production, and sales of home and office computers. It is also involved in the high-end computer market and produces and sells servers, data storage equipment, network equipment, PDAs, software, printers and other products.

Hewlett-Packard (HP; Hewlett-Packard) is a global information technology company from the United States. It was founded in 1939 by two graduates of Stanford University, William Hewlett and David Packard. It is a printing and imaging and IT company. A giant in services. HP's three major business groups include Information Products Group, Printing and Imaging Systems Group, and Enterprise Computing and Professional Services Group.

Apple, formerly known as Apple Computer Company, specializes in electronic technology products. It was founded by Steve Jobs, Steve Wozniak and others on April 1, 1976. It is known for its innovation among many high-tech companies. And famous. Its main representative products include Apple II, Macbook, iPod, iTunes, iMac, iPhone and iPad, etc.