Some of the other code bases I'd love to see released include OS/2, Northstar Operating System and Northstar BASIC, all of the less successful e-mail clients, the DO Operating system, CP/M, CP/M-86, the GEM operating system, languages such as SNOBOL and defunct versions of FORTRAN, and all the old Borland stuff that is off the market. What about Banyan Vines?
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Source: ABC News