Apollo Computer Inc., founded 1980 in Chelmsford, Massachusetts by William Poduska (a founder of Prime Computer) and others, developed and produced Apollo/Domain workstations in the 1980s. Along with Symbolics and Sun Microsystems, Apollo was one of the first vendors of graphical workstations in the 1980s. Apollo produced much of its own hardware and software.Apollo was acquired by Hewlett-Packard in 1989 for US$476 million, and gradually closed down over the period 1990-1997.