Ian,
Here is the coin inventory software, I have used for years. http://www.trovesoftware.com/mainorder.html It is available for just about any operating system, and is very reasonable. For World Coins you would probably want Elite v6.26. There is another version that has all USA coins, and values pre-loaded...v17.53. The v 17.53 can also be used for World Cons.. You can load pictures of each of your coins if you wish. The program is very user friendly.