Stumped by ‘Authors’ submissions: Abbr.’? Unlock the Answer Here!

Short form for texts sent digitally: text
Something that could help with organization: Post-It Notes
Abbreviation for “return to sender”: RTS
Common filler word in conversation: um
Abbreviation meaning “and others”: etc.
Abbreviation for “approximately”: approx.
The tool you use to write digitally: computer
The opposite of closed: open
Abbreviation for “number”: #
Abbreviation indicating possession: ‘s
The name for a legal document: contract
Last two letters of “happiness”: ss
Abbreviation for a medical degree: MD
The opposite of “yes”: no
Abbreviation for a music degree: BM
A building that holds many books: library
Abbreviation for a high school diploma: HS
Abbreviation for “et cetera”: etc.
Abbreviation for “as soon as possible”: ASAP
An abbreviation meaning “including”: incl.