| Acronym | Meaning |
 | PSTN | Public Switched Telephone Network |
| PMT | Photomultiplier Tube |
| MATHML | Mathematical Markup Language |
| DIVX | Digital Video Express |
| ISAM | Indexed Sequential Access Method |
| SMIF | Stream-based Model Interchange Format |
| CTP | Community Technical Preview |
| AWHFY | Are We Having Fun Yet |
| ISO | International Organization For Standardization |
| RTT | Round-trip Time |
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