| FNO | Futures and Options (investment banking) | 期货和期权(投资银行) |
| FNO | Following Named Officer(s) | 以下指定官员 |
| FNO | Foreign Namespace Object | 外部命名空间对象 |
| FNO | Frozen Natural Orbital | 冻结自然轨道 |
| FNO | Foreign Network Operator | 外国网络运营商 |
| FNO | Fixed Network Operator (telephony) | 固定网络运营商(电话) |
| FNO | Friends Night Out | 朋友们晚上外出 |
| FNO | For No One (Beatles song) | 《为无人》(披头士歌曲) |
| FNO | From Now On | 从现在开始 |
| FNO | For Nerds Only | 仅供书呆子使用 |
| FNO | functional neck dissection | 功能性颈部解剖 |
| FNO | Frente Nacional de OposiciÓn | Frente Nacional de OposiciÓn |