The 486SX is a microprocessor developed by Intel and released in 1991. It is part of the Intel 80486 family and is known for its 32-bit architecture, which allows for improved performance and multitasking capabilities compared to its predecessors. The "SX" designation indicates that it lacks a built-in math coprocessor, which was available in the higher-end 486DX model. The 486SX was commonly used in personal computers during the early 1990s, providing a balance between cost and performance. It typically operated at clock speeds ranging from 20 to 33 MHz, making it suitable for various applications, including office productivity and basic gaming.