SmallOps() has been around a while, but runs pretty well for all that. I began it when fancy new computer displays printed orange characters on black backgrounds - and that was all.
Today, SmallOps() has moved up to white on black. This bothers old people who look at it and see a DOS program - despite the fact it's running native on 64-bit linux, and writes its own web pages.
Well, I've thought a lot about a better interface. I'm still thinking.