
R:base 5000 through R:base 2000 (6.5)
Since 1985 PCI has been developing applications using all of the R:base
versions listed below. No matter how old your application might be, PCI
will support it and/or help you bring it forward to the most current DOS,
Windows 3.x and Windows 95 platforms.
Version  Windows Release Date  DOS Release Date 
R:base 5000  N/A  April, 1985 
R:base System V  N/A  June, 1986 
Rbase 2.0  N/A  December, 1987 
Rbase 2.11  N/A  September, 1988 
R:base 3.0  N/A  April, 1990 
R:base 3.1  N/A  November, 1990 
R:base 3.1A  N/A  March, 1991 
R:base 3.1B  N/A  July, 1991 
R:base 3.1C  N/A  January, 1992 
R:base 4.0  N/A  July, 1992 
R:base 4.0A  N/A  February, 1993 
R:base 4.5  N/A  July, 1993 
R:base 4.5 Plus  N/A  January, 1994 
R:base 4.5++  N/A  October, 1994 
R:base 5.0  March, 1995   
R:base 5.1  June, 1995   
R:base 5.5  December, 1995  March, 1996 
R:base 6.0  November, 1996  December, 1996 
R:base 6.1  June, 1997   
R:base 2000 (6.5)  January 2000   
