| PFX | Purple Fluid Exchange (band) | 紫色液体交换（带） |
| PFX | Personal Information Exchange | 个人信息交换 |
| PFX | Generic Police Term for Multi-Channel Packset Radio | 多信道分组无线电通用术语 |
| PFX | Placed Found Exchanged (letterboxing count) | 已放置找到已交换（信箱计数） |
| PFX | Powerflex (database file extension) | Powerflex（数据库文件扩展名） |
| PFX | Penning Fusion eXperiment | Penning Fusion电子体验 |