f-number (sometimes called f-ratio, f-stop, or written f/), the focal length divided by the aperture diameter
Force - In physics, a force is any influence that causes an object to undergo a certain change, either concerning its movement, direction, or geometrical construction.
Form (botany) - In botanical nomenclature, a form (forma, plural formae) is one of the "secondary" taxonomic ranks, below that of variety, which in turn is below that of species; it is an infraspeci...
Frequency - Frequency is the number of occurrences of a repeating event per unit time.
Bioavailability, which is expressed as the letter "F" in medical chemistry equations
F band, the range of radio frequencies from 3 to 4 GHz
f-block, a group of elements on the periodic table elements
Forte (music) - In music, dynamics normally refers to the volume of a sound or note, but can also refer to every aspect of the execution of a given piece, either stylistic (staccato, legato etc.) or functional ...
F (album), an album by Japanese singer Masaharu Fukuyama