Cyrillic Armenian Georgian Coptic Runic/Futhark: Unicode range: See Latin characters in Unicode: ISO 15924: Latn: Note: This page may contain IPA phonetic symbols in Unicode. Latin or Roman script, is a writing system used to write many modern-day languages. It is the most used writing system in the world today.

Ef (Cyrillic) (Ф, ф), a letter in the Cyrillic alphabet; F, a Latin letter; Science Biology and psychology. Ejection fraction, in cardiovascular physiology; Elongation factors, proteins that are important in protein synthesis; Executive functions, a theorized cognitive system in psychology that controls and manages other cognitive processes

In Latin (as in Modern Greek), it was also used to represent /j/ and this use persists in the languages that descended from Latin. The modern letter ' j ' originated as a variation of 'i', and both were used interchangeably for both the vowel and the consonant, coming to be differentiated only in the 16th century. [3]