Answer:

A

B

O

We have spotted ABO (3 Letters) a total of 35 times in our database. Below you may see the clues associated with ABO and also when and where was it last seen:

Referring crossword puzzle clues

• Blood-typing letters
• Blood-typing system
• Type set for a bank
• Blood-group letters

Usage among publishers:

• Newsday: May 5, 2024
• Newsday: Apr 19, 2024
• Premier Sunday: Aug 13, 2023
• Newsday: Jul 23, 2023
• Wall Street Journal: Feb 23, 2023
• LA Times: Feb 11, 2023
• Wall Street Journal: Jan 21, 2023
• Newsday: Oct 15, 2022
• Wall Street Journal: Sep 16, 2022
• Eugene Sheffer: May 12, 2022
• Newsday: May 5, 2022