NIXSYS offers Legacy DOS Computers, that are ideal for companies looking to fit legacy technology into a new powerful P4 computer or desktop. These MS DOS Computers with older MS DOS Operating systems are an invaluable tool. Especially for companies that need to update their old computers but still require older DOS Computer's operating systems. Our computers are compatible with a variety of different new and old operating systems such as Microsoft Windows XP Professional, Windows 2000, Windows 98, NT 4.0, and MS DOS among others. NIXSYS standard product line of Legacy DOS Computers are available in a mid-tower, micro tower and desktop format. Also available in 2U, 3U, and 4U rackmount chassis. Here at NIXSYS, we build brand new custom-built DOS Computers with industry standard components at very low prices.