Original sentence: The production chip, codenamed EV4, was fabricated using DEC's 0.75um CMOS-4 process.This test chip was fabricated using DEC's 1.0 micron CMOS-3 process
Edited sentence: The production chip, codenamed EV4, was fabricated using DEC's 0.75 µm CMOS-4 process.This test chip was fabricated using DEC's 1.0 micrometre (µm) CMOS-3 process