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

• crowd sail
• crowdsource
• crowdsourced
• crowdsourcer
• crowdsourcers
• crowdsources
• crowd-sourcing
• crowdsourcing
• crowd surf
• crowd surfed
• crowd surfing
• crowd surfs
• crowed
• crow-flower
• crow-flowers
• crowfoot
• crowfoots
• crowing
• crow-keeper
• crow-keepers
• crown
• crown agent
• crown agents
• crown and anchor
• crown antler