IBM is the world's largest manufacturer of computer chips. Although it has been challenged in recent years by newcomers AMD and Cyrix, Intel still Predominate the market for PC microprocessors. Nearly all PCs are based on Intel's x86 architecture. IBM (International Business Machines)IBM (International Business Machines) is by far the world's largest information technology company in terms of Gross ($88 billion in 2000) and by most other measures, a position it has held for about the past 50 years. IBM products include hardware and software for a line of business servers, storage products, custom-designed microchips, and application software. Increasingly, IBM derives revenue from a range of consulting and outsourcing services. In this paper we will compare different technologies of computer system, its processor and chips.