Concurrent Controls has developed and sold Multiuser DOS solutions for more than 16 years.  Our products offer both high performance and the robust stability required for 24/7 operations.  CCI solutions maximize the value of your investment in PC hardware and software by distributing the power and resources of one PC across many users.  

What's New?  Release 18 of Multiuser DOS Gold went into production in April, 2005. Click here for more details on R18 and earlier releases.

If you're using Concurrent DOS or Multiuser DOS from Digital Research, Novell, Concurrent Controls or another OEM, we have Y2K solutions for those products. Click here if you'd like details on potential Y2K problems, or the Y2K status of the particular version you are using.