| Acronym | Meaning |
 | CSICOP | Committee For The Scientific Investigation Of Claims Of The Paranormal (became The Committee For Skeptical Inquiry In 2006) |
| DIFAR | DIrectional Frequency Analysis And Recording |
| ZK | Zettakelvin |
| CDM | Clean Development Mechanism (Kyoto Protocol) - Cold Dark Matter (astronomy) |
| TTL | Time 'till Live - Time To Live - Transistor-transistor Logic |
| PPP | Point-to-Point Protocol - Purchasing Power Parity |
| UCI | Union Cycliste Internationale (French |
| MET | Meteorological -Middle European Time |
| DY | Dysprosium |
| UMK | Uniwersytet Miko?aja Kopernika (Polish Nicolaus Copernicus University) |
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