Also the first game I learned to 'hack', and it's what set me on the path to learning programming: I discovered a hex file editor on a floppy and had a hunch about how things might fit together.
So I saved a game, waited a second until some money was spent in the game and then saved again into a different slot. Thereafter I went through the two save game files, visually figured out which parts were different between the files, changed the magical numbers I saw, reloaded the game and slowly figured out how to make myself rich :)
(This worked much better than my earlier attempt with the disk editor I found where I thought I was really clever compressing files by changing their size to 0.)
http://en.wikipedia.org/wiki/List_of_countries%27_copyright_...
95 years from publication or 120 years from creation whichever is shorter (anonymous works, pseudonymous works, or works made for hire, published since 1978)
1923 is the base-line year for any works with a proper copyright notice. 1977 for any works at all, as the requirement for a notice or registration was eliminated.