Throughout my computer programming career, I have used a variety of computers and a number of different operating systems. My preference has usually been platforms that run on IBM-compatible PCs. I have used the latest versions of Microsoft Windows. I also have some experience with Sun Solaris, UNIX, Apple MacOS, AmigaDOS, MS-DOS and CP/M. Below me is a detailed list of all the operating systems that I have used:
Operating System Experience Proficiency
Microsoft Windows 7 Professional
  2 years (2009-present)
Advanced
Microsoft Windows Vista Business
  2 years (2007-2009)
Advanced
Microsoft Windows XP Professional and Home Edition
10 years (2001-present)
Expert
Microsoft Windows 2000 Professional
  5 years (2000-2005)
Advanced
Microsoft Windows NT 4.0, 3.51, 3.5, 3.1
  6 years (1998-2004)
Advanced
Microsoft Windows 98 SE
  6 years (1998-2004)
Advanced
Microsoft Windows 95
  8 years (1995-2003)
Advanced
Microsoft Windows for Workgroups 3.11
  6 years (1992-1998)
Advanced
Microsoft Windows 3.1
  6 years (1992-1998)
Advanced
Microsoft MS-DOS and PC-DOS 6.x, 5.x, 4.x, 3.x, 2.x, 1.x
29 years (1982-present)
Advanced
Apple Mac OS X, 9, 8 and 7
20 years (1991-present)
Light Exp.
Sun Solaris (UNIX)
  8 years (1990-1998)
Intermediate
UNIX
  8 years (1992-1998)
Intermediate
Sun Open Windows (UNIX)
  6 years (1992-1998)
Intermediate
Commodore AmigaDOS
  4 years (1986-1990)
Advanced
Apple II DOS 3.2 and 3.3
  3 years (1983-1986)
Advanced
Digital Research CP/M
  3 years (1983-1986)
Advanced
You are visitor 115222You are visitor 115222You are visitor 115222You are visitor 115222You are visitor 115222You are visitor 115222You are visitor 115222