I came upon the shortcut xact standing for transaction in Postgres database:
The word transaction is often abbreviated as xact.
Then I found that this is probably not Postgres-specific, and it is also used elsewhere:
TR: Used in the banking industry.
TRX: Used in the cryptocurrency industry.
XACT: Used in the business world.
How is "XACT" similar to "Transaction" so it became its abbreviation?