| Site's
That I Use |
| BSAC | The British Sub-Aqua Club |
| PADI | Professional Association of Diving Instructors |
| IANTD | International Association of Nitrox and Technical Divers |
| TDI | Technical Diving International |
| BASI | British Association of Ski Instructors |
| PSIA | Proffesional Ski Instructors of America |