Clue: Not an upgrade: Abbr.

Answer: STD

Length: 3

---

Similar Clues:

• Host of an annual convention attended by publishers: Abbr. (ABA with 3 letters)
• Roll-call note: Abbr. (ABS with 3 letters)
• Roll-book notation: Abbr. (ABS with 3 letters)
• Annapolis: Abbr. (ACAD with 4 letters)
• Andover or Exeter: Abbr. (ACAD with 4 letters)
• Unlike this answer (abbr.) (ACR with 3 letters)
• Horizontal, like this answer: abbr. (ACR with 3 letters)
• Annex: Abbr. (ADDN with 4 letters)
• Edwards or Andrews: Abbr. (e.g. AFB with 3 letters)
• Wright-Patterson or Andrews: abbr. (AFB with 3 letters)