Intel iAPX 432

The Intel iAPX 432 was a commercially unsuccessful 32-bit microprocessor architecture, introduced in 1981. The project was Intel's first 32-bit microprocessor design, and intended to be the company's main product line for the 1980s. Many advanced multitasking and memory management features were implemented in hardware, leading to the design being referred to as a Micromainframe. ("iAPX" reportedly stands for intel Advanced Processor architecture, the X coming from the Greek letter Chi.)