| CD | Compact Disk |
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| DCW | Digital chart of the World |
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| DMA | Defense Mapping Agency (U.S.) |
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| D-SLR | Digital-Single Lens Reflex |
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| GPS | Global Positioning System |
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| IAU | International Astronomical Union |
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| IOTA | International Occultation Timing Association |
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| ITCZ | Intertropical Convergence Zone |
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| JNC | Jet Navigation Charts |
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| NMEA | National Marine Electronics Association |
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| NOS | National Ocean Service |
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| ONC | Operational Navigation Charts |
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| SASE | Self Addressed Stamped Envelope |
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| SDAC | Solar Data Analysis Center |
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| SEML | Solar Eclipse Mailing List |
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| SLR | Single Lens Reflex |
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| TD | Terrestrial Dynamical Time |
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| USGS | United States Geological Survey |
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| UT | Universal Time |
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| UV | Ultraviolet |
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| WDBII | World Data Bank II
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