What is "INTEL" and "AMD".?

INTEL

Intel logo

The world's largest manufacturer of computer chips. Although it has been challenged in recent years 
by newcomers AMD and Cyrix, Intel still dominates the market for PC microprocessors. Nearly all PCs are based on Intel's x86architecture.Intel was founded in 1968 by Bob Noyce and Gordon Moore. Strategically, it is closely allied with Microsoft because the Windows 3.x and 95 operating systems are designed for x86 microprocessors. The popularity of Windows creates a demand for Intel or Intel-compatible microprocessors. Many people refer to this alliance as Wintel (short for Windows-Intel)

AMD

AMD logo

Advanced Micro Devices, Inc. or AMD is an American multinational semiconductor company based in Sunnyvale, California, that develops computer processors and related technologies for commercial and consumer markets. Its main products include microprocessors,motherboard chipsets, embedded processors and graphics processors for servers, workstations and personal computers, and embedded systemsapplications.
AMD is the second-largest global supplier of microprocessors based on the x86 architecture and also one of the largest suppliers of graphics processing units. It also owns 8.6% of Spansion, a supplier of non-volatile flash memory.
AMD is the only significant rival to Intel in the central processor (CPU) market for (x86 based) personal computers. Together they held 99.1 percent (Intel 80.3%, AMD 18.8%) of the CPUs sold for quarter three of 2011. Since acquiring ATI in 2006, AMD and its competitor Nvidiahave dominated the discrete graphics processor unit (GPU) market, together making up virtually 100% of the market.