| Term | Full Form | Definition | Meaning | Main Category | Subcategory | Country/ Region | Popularity |
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| FSN | Family Support Network | Associations & Organizations › Regional Organizations |  |
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| FSN | Feature Story News | Media & Entertainment › News |  |
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| FSN | Federal Stock Number | Governmental › Military | |
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| FSN | File System Navigator | Computing › Software & Applications | |
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| FSN | Fox Sports News | Media & Entertainment › News |  |
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| FSN | Fu's Subcutaneous Needle | Medical › Alternative Medicine | |
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| FSN | Fronte Sociale Nazionale | Governmental › Politics |  |
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| FSSAI | Food Safety and Standards Authority of India | Governmental › Departments & Agencies |  |
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| ft | foot / feet | Academic & Science › Units | |
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| Ft | Forint | Regional › Currencies |  |
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| FT | Financial Times | Media & Entertainment › News | |
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| ft | Featuring | Arts › Performing arts | |
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| FT | Fourier Transform | Academic & Science › Mathematics | |
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| FT | Full Time | Business › Business Terms | |
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| Ft | Impulse | Academic & Science › Physics | |
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| FT | FaceTime | Miscellaneous › Chat & Messaging | |
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| FT | Fault Tolerance | Computing › Hardware | |
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| FT | Fluctuation Theorem | Academic & Science › Physics | |
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| FT | Fire Control Technician | Governmental › Military | |
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| FT | Fischertechnik | Business › Companies & Corporations |  |
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| FT | Free Throw | Sports & Games › Basketball | |
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| FT | Fowl Typhoid | Animal Kingdom › Animal Diseases | |
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| FT | First Things | Media & Entertainment › Journals & Publications | |
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| FT | Fortean Times | Media & Entertainment › Journals & Publications |  |
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| FT | Fighting Talk | Media & Entertainment › TV & Radio | |
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