| OPEX '94 (6/1/2004) | The Office Products Exposition 1994 was held in Toronto. It was a worldwide gathering of explorers, from Alaska to Australia to Denmark. |
| OPEX '77 (7/25/2007) | The fourth annual Opex international explorers meet. Explorers from many American states as well as Canada and Australia met in Buffalo, NY to see the sights and make new friends. |
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