Alibaba's cloud computing unit is making its Apsara operating system compatible with processors based on Arm, x86, RISC-V, among other architectures, the company announced at a conference on Friday. Alibaba Cloud is one of the fastest-growing businesses for the Chinese e-commerce giant and the world's fourth-largest public cloud service in the second half of 2020, according to market research firm IDC. The global chip market has mostly been dominated by Intel's x86 in personal computing and Arm for mobile devices.