| YAC | Yeast Artificial Chromosome | 酵母菌人工合成染色体 |
| YAC | Yukon Arts Centre (Whitehorse, Yukon Canada) | 育空艺术中心（加拿大育空州怀特霍斯） |
| YAC | Youth Adult Council (Young Religious Unitarian Universalist regional governance body) | 青年成人理事会（青年宗教统一普遍主义区域治理机构） |
| YAC | Young Artist Competition | 青年艺术家比赛 |
| YAC | Yeast Artificial Chromosomes | 酵母人工染色体 |
| YAC | Cat Lake, Ontario, Canada | 加拿大安大略省卡特湖 |
| YAC | Youth Activity Center | 青少年活动中心 |
| YAC | Yet Another Caller ID Program | 又一个来电显示程序 |
| YAC | Yale Alumni Chorus | 耶鲁校友合唱 |
| YAC | Youth Annual Conference | 青年年会 |
| YAC | Youth Adult Committee | 青少年成人委员会 |
| YAC | Youth And Adults For Community | 社区青年和成年人 |
| YAC | Yolo Atari Club | Yolo Atari俱乐部 |
| YAC | Young Audiences of Connecticut | 康涅狄格州的年轻观众 |
| YAC | Young American Comics | 年轻的美国漫画 |
| YAC | Youth Action Committee (Canada) | 青年行动委员会（加拿大） |
| YAC | Yet Another Creation | 又一次创造 |
| YAC | Youth Advisory Committee | 青年咨询委员会 |
| YAC | Yards After Contact (football) | 接触后场地（足球） |
| YAC | Yukon Arts Council (Canada) | 育空艺术委员会（加拿大） |
| YAC | You Available to Chat? | 你可以聊天吗？ |
| YAC | Young Astronauts Club | 青年宇航员俱乐部 |
| YAC | You're Always Connected | 你总是联系起来 |
| YAC | Young Astronauts Club (band) | 青年宇航员俱乐部（乐队） |
| YAC | You Are Cool | 你很酷 |
| YAC | Youth Advisory Council | 青年咨询委员会 |
| YAC | Youth Activities Center | 青年活动中心 |
| YAC | Youth Artist Competition | 青年艺术家比赛 |
| YAC | Yards After Catch (football) | 接球后场地（足球） |
| YAC | Yet Another Catfight | 又一场猫斗 |
| YAC | Young Adult Council | 青年理事会 |
| YAC | Young Adult Conference (Church of the Brethren conference for young adults) | 青年会议（青年教会会议） |
| YAC | Young Archaeologists Club (UK) | 青年考古学家俱乐部（英国） |
| YAC | Young Adult Class | 青少年班 |