This presentation summarizes the historical background of several major microprocessor companies, including Intel, IBM, AMD, and MIPS Technology. It discusses the evolution of microprocessors from early 4-bit processors like the Intel 4004 to more advanced 8-bit and 64-bit processors. For each company, it outlines some of the most notable microprocessor models released over the years, along with key details about their specifications and impact. The presentation concludes that the microprocessor has transformed computing and undergone rapid advancement from its initial conception to today's high-powered multiprocessor systems.