FR4 may refer to:
*
FR-4
FR-4 (or FR4) is a NEMA grade designation for glass-reinforced epoxy laminate material. FR-4 is a composite material composed of woven fiberglass cloth with an epoxy resin binder that is flame resistant (''self-extinguishing'').
"FR" stands fo ...
or FR4, a NEMA grade designation for glass-reinforced epoxy laminate material
* ''
The Magister
''The Magister'' is an accessory for the Forgotten Realms campaign setting of the first edition ''Advanced Dungeons & Dragons'' fantasy role-playing game. The book, with product code TSR 9229, was published in 1988 by TSR. It was written by Ed ...
'', the fourth supplement of the ''Forgotten Realms'' series role-playing game
*
France 4
France 4 () is a French free-to-air television channel owned by France Télévisions, focused on children's programming. The colour of France 4 is purple.
Originally launched as Festival in 1996, the channel took its current name in 2005 when it ...
, a television channel in France
{{Letter-Number Combination Disambiguation