Diacritical marks for IBM (works for Microsoft Word)
Control + shift + ~ (press all at once, then) + n = ñ
Control + ' (all at once) + (a, e, i, o, or u) = á, é, í, ó, or ú
Control + shift + ; (all at once) + u = ü
Alt + Ctrl + Shift + (all at once) ? = ¿
Alt + Ctrl + Shift (all at once) + ! = ¡