Points prev. omitted, perhaps

• Abbrevs. after signatures
• Letters after letters
• Letter writer's afterthoughts
• They may follow signatures: Abbr
• Add-ons: Abbr.
• Endings to some letters, for short
• Ends of letters, briefly
• Abbrevs. that signify "OH SHIT I forgot to write this in the letter..."
• Letter afterthoughts letters

Wikipedia Word definitions in Wikipedia
PSS may refer to: