Marble Computer develops and sells mainframe COBOL software DCD III. Its clients include AT&T, Bank of America, Allstate, PNC Bank, Texas Instruments, American Express and the United States Postal Service. Marble had two of their software packages chosen by the General Service Administration s Programmers Workbench as standard productivity tools for the federal government. In addition, the company has earned the International Computer Programs coveted Five Million Dollar Club Award. Marble Computer was founded in 1983 and has headquarters in El Paso, Texas.