I remember some 35-40 years ago when I was a young man growing up in the UK and the advent of the PC.

I used to go in to the local electronics store and play on one and from what I remember you programmed it in Base 10, as in the screen looked something like this

10: 

20:

30:

etc etc and you typed in your commands.

I can also vaguely remember that you could get an endless loop going by typing in a command at "10" then one at "20" and then at "30" typing in go to 10.

Now this is a looong time ago and my memory might not be spot on so can other geeks throw some light on this, would love some more details, makes of PC, the actual year and any other relevant info would be great. 

Thanks

Bernard