ff or ff.

1. Fecerunt (Latin), (they) did it or made it
2. Folios (printing)
3. Following pages, lines, etc
4. Fortissimo (music)

FF

1. Form feed (computing)
2. French franc or francs

• movie theatres
• moving
• moving average
• moving-coil
• movingly
• moving map
• moving maps
• moving pavement
• moving pavements
• moving pictures
• moving staircase
• moving staircases
• moving walkway
• moving walkways
• Moviola
• mow
• MOW
• mowa
• mowburn
• mowburned
• mowburning
• mowburns
• mowburnt
• mowdiewart
• mowdiwort