Microsoft: Steady Revenue ExpansionMicrosoft (MSFT +1.01%) primarily generates revenue by licensing software applications, providing cloud computing services, and selling computing and gaming hardware to diverse global enterprise and consumer customers. Aehr Test Systems: Navigating Extreme Revenue FluctuationsAehr Test Systems (AEHR +4.03%) primarily generates revenue by designing and providing advanced burn-in and testing systems that help global manufacturers verify the reliability of complex integrated circuits. Foolish TakeComparing revenue trends between Microsoft and Aehr Test Systems provides revealing insights. Aehr Test Systems experienced volatile swings in sales over the past several quarters, as its role in testing for the semiconductor industry does not lend itself to the kind of consistent revenue growth seen with Microsoft. Consequently, Aehr Test Systems stock edged past $100, up over 400% in 2026 through August 4.