Dell Inc. is an American privately owned multinational computer technology company based in Round Rock, Texas, United States, that develops, sells, repairs, and supports computers and services.

IBM (International Business Machines) ia an american electronic corporation, one of the world's largest manufacturers of all types of computers and software, one of the largest providers of global information networks. The corporation ranks sixth in the list of the largest companies in the world. Headquartered in Armonk, New York, USA. The story begins in the 19th century. IBM manufactures and sells hardware and software, services (hosting, consulting) in the areas from mainframes to nanotechnology.

Konica Minolta, Inc. is a Japanese technology company headquartered in Marunouchi, Chiyoda, Tokyo, with offices in 49 countries worldwide.[1] The company manufactures business and industrial imaging products, including copiers, laser printers, multi-functional peripherals (MFPs) and digital print systems for the production printing market. Konica Minolta's Managed Print Service (MPS) is called Optimised Print Services. The company also makes optical devices, including lenses and LCD film; medical and graphic imaging products, such as X-ray image processing systems, colour proofing systems, and X-ray film; photometers, 3-D digitizers, and other sensing products; and textile printers. Source: https://en.wikipedia.org/wiki/Konica_Minolta

Lenovo Group Limited is a Chinese multinational corporation that manufactures personal computers and other electronics. It is one of the world's largest manufacturers of personal computers, smartphones, and servers. Lenovo's headquarters are located in Beijing (PRC), the company is registered in Hong Kong. The main research centers of the company are located in Beijing, Shanghai and Shenzhen (PRC), as well as in Yamato (Japan). The team of the company employs over 52 thousand people, and its clients are located in more than 160 countries In 2005, Lenovo bought out the personal computer division from IBM, and later in 2014 also acquired the IBM server systems business. Also in 2014, Lenovo bought the Motorola Mobility company from Google, but in February 2017 Lenovo announced the termination of the production of smartphones under the Motorola and Vibe trademarks, while continuing to release its mobile products under the Lenovo Moto brand. Today, Lenovo's product portfolio includes tablets, smartphones, laptops, PCs, workstations, servers, storage systems, and other consumer and enterprise-grade electronics. In addition, Lenovo has its own strong R&D department. The company's annual turnover is approaching $ 50 billion.

Microsoft Corporation is an multinational technology company headquartered in Redmond, Washington, that develops, manufactures, licenses, supports and sells computer software, consumer electronics and personal computers and services. Its best known software products are the Microsoft Windows line of operating systems, Microsoft Office office suite, and Internet Explorer and Edge web browsers. Its flagship hardware products are the Xbox video game consoles and the Microsoft Surface tablet lineup. As of 2011, it was the world's largest software maker by revenue, and one of the world's most valuable companies.