Minor was Comp. Info Science. Always used PC at work. Always used at home too. Currently have a HP Compaq dc7900 Refurbished PC that I bought somewhere around 2008 to 2010. Has Windows xp 64 bit, then installed win 7 64 bit, then win 10 64 bit. No major issues (except an update almost a year ago made my HDMI drive no longer work). All the manufacturers want me to throw away my PC and spend more money on a new one. I know that I can keep this one going for many years. 3TB HD still almost empty. What I like most about is that it is easy to open up and every section snaps out and unplugs easily. I very easily installed the 3TB HD. Love it.