IBM made a significant impact on the personal and business computing markets from the 70s through the 80s. Starting with the IBM 5100 in 1975, IBM's computers were known for their reliability and advanced features. The IBM PC, introduced in 1981, set the standard for personal computers, leading to a series of successful models including the IBM PC XT, PC AT, and the PS/2 series. Explore the history, specifications, and impact of IBM’s iconic models below.