Chain email abbr

• Abbr. in an email header
• Abbr. on some emails
• Rev.'s rev
• 'Skip ahead' abbr. on a music player
• Bk. introduction
• Subject line abbr
• F on a DVD player, perhaps
• Modern chain letter: Abbr
• Start of some email subj. lines

Wiktionary Word definitions in Wiktionary
abbr. forward