F on a DVD player, perhaps

• Email command
• "Sent along," in an email subject line: Abbr
• Start of some email subj. lines
• Subject line letters
• Subject line abbr
• 'Skip ahead' abbr. on a music player
• Bk. introduction
• E-mail letters
• E-mail heading: Abbr

Wiktionary Word definitions in Wiktionary
abbr. forward