| ETS | educational testing service; electrical transcranial stimulation |
|---|---|
| FES | family environment scale; fat embolism syndrome; flame emission spectroscopy; forced expiratory spir... |
| FNS | frontier nursing service; functional neuromuscular stimulation |
| FS | factor of safety; Fanconi syndrome; Felty syndrome; fibromyalgia syndrome; field stimulation; Fisher... |
| FSN | functional stimulation, neuromuscular |