"I'm away from the computer for a few minutes," in three letters

• "Hold on a sec," while texting
• "Returning soon," in texts
• "One sec, gotta talk 2 my parents quickly"
• Palindromic "Hang tight" text
• "Just a sec!," in a text
• "Hang on a sec," to a texter
• "Just a sec," in text-speak
• Texter's "I will return shortly"

Wiktionary Word definitions in Wiktionary
init. (alternative case form of BRB nodot=1 English) (gloss: be right back).

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
by 1996, Internet chat acronym for be right back .