| ATN | acute tubular necrosis | 急性肾小管坏死 |
| ATN | Addition Transition Network | 增强转移网络 |
| ATN | Augmented Transition Network | 扩充转移网络 |
| ATN | Advanced TIROS-N | 改进型泰罗斯－Ｎ |
| ATN | Adaptive Tactical Navigation | 自适应战术导航 |
| ATN | Asian Television Network | 亚洲电视网 |
| ATN | assign thresholds (US DoD) | 分配阈值（美国国防部） |
| ATN | Africa Trade Network | 非洲贸易网络 |
| ATN | Air Technology Network | 空中技术网络 |
| ATN | autonomous thyroid nodule | 自主性甲状腺结节 |
| ATN | Across the Nightmare (Dance Dance Revolution song) | 穿越噩梦（舞蹈革命歌曲） |
| ATN | Australian Television Network (Sydney, Australia) | 澳大利亚电视网（澳大利亚悉尼） |
| ATN | Namatanai, Papua New Guinea | 巴布亚新几内亚纳马塔奈 |
| ATN | Automatic Track Number (SYS-1) | 自动轨道编号（SYS-1） |
| ATN | Arriva Trains Northern (UK train operator) | Arriva Trains Northern（英国火车运营商） |
| ATN | Albinism, Tyrosinase-Negative | 白化病，酪氨酸酶阴性 |
| ATN | Ausbildungs- und Tätigkeitsnachweis (German: training and activity proof, water emergency service) | Ausbildungs- und Tätigkeitsnachweis (German: training and activity proof, water emergency service) |
| ATN | Advanced Television Infrared Observation Satellite | 先进电视红外观测卫星 |
| ATN | Air Traffic Network | 空中交通网络 |
| ATN | Aeronautical Telecommunications Network | 航空电信网络 |
| ATN | Air Tahiti Nui | 塔希提岛努伊航空公司 |
| ATN | Amateur Television Network (FastScan) | 业余电视网络（FastScan） |
| ATN | AgTa1-xNbxO3 (Silver tantalate niobate; ferroelectric material) | AgTa1-xNbxO3（钽酸银铌酸盐；铁电材料） |
| ATN | Attention (IEEE-488 / IEC-625 Interface Bus) | 注意(IEEE-488 / IEC-625接口总线) |
| ATN | Advanced Tiros N (satellite) | 高级Tiros N（卫星） |
| ATN | Accelerator Technical Note | 加速器技术说明 |
| ATN | Acyclic Transmission Network | 非循环传输网络 |
| ATN | Account Telephone Number | 账户电话号码 |
| ATN | Astrophysical Teletype Network | 天体物理电传网络 |
| ATN | All Together Now (Beatles song) | All Together Now（披头士歌曲） |
| ATN | Agri-Food Trade Network (Canada) | 农业食品贸易网络（加拿大） |