Short DOS is a computer operating system developed by Microsoft in the 1980s. It was designed to be a simpler version of the MS-DOS operating system, and was used primarily on home computers. BOBS stands for 'Basic Operating System Services', which were the core components of the Short DOS system. These services included basic input/output functions, memory management, and disk access. Short DOS was eventually replaced by Windows 95, but it still remains a popular choice for some users.