For I486sl we have a term and definition in Technology.

A low-power-consumption version of Intel's i486DX microprocessor designed primarily for laptop computers. The i486SL operates at a voltage of 3.3 volts rather than 5 volts, can shadow memory, and has a System Management Mode (SMM) in which the microprocessor can slow or halt some system components when the system is not performing CPU-intensive tasks, thus prolonging battery life. See also i486DX, shadow memory.
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