升阳电脑（英语：Sun Microsystems，中国大陆分公司原称作“太阳计算机系统（中国）有限公司”，现为“甲骨文（中国）软件系统有限公司”；**分公司原称作「升阳电脑股份有限公司」亦作「升阳公司」，现为「美商甲骨文有限公司**分公司」）创建于1982年2月24日，1986年在美国那斯达克上市。主要产品是工作站、服务器和UNIX 操作系统。1992年升阳推出了市场上第一台多处理器工作站SPARCstation 10，并于次年进入财富500强。SUN公司的名字是由Stanford University Network缩写而来。

Sun Microsystems, Inc. was a company that sold computers, computer components, computer software, and information technology services and that created the Java programming language, Solaris Unix and the Network File System (NFS). Sun significantly evolved several key computing technologies, among them Unix, RISC processors, thin client computing, and virtualized computing. Sun was founded on February 24, 1982. At its height, Sun headquarters were in Santa Clara, California (part of Silicon Valley), on the former west campus of the Agnews Developmental Center.