| | | | | | | | | | | |
| Abbreviation | Description | Abbreviation | Description |
| ACL | Allowance for credit losses | GDP | Gross domestic product |
| AFS | Available-for-sale | GNMA | Government National Mortgage Association |
| ALCO | Asset/Liability Committee | HTM | Held-to-maturity |
| AOCI | Accumulated other comprehensive income (loss) | IAL | Individually Analyzed Loans |
| ASC | Accounting Standards Codification | IRS | Internal Revenue Service |
| ASU | Accounting Standards Update | MPF | Mortgage Partnership Finance Program |
| C&I | Commercial and Industrial | OAEM | Other assets especially mentioned |
| CDs | Certificates of deposit | OCC | Office of the Comptroller of the Currency |
| CECL | Current Expected Credit Loss | OCI | Other comprehensive income (loss) |
| CET1 | Common Equity Tier 1 | OIS | Overnight Indexed Swap |
| CLLD | Construction, land, and land development | OREO | Other real estate owned |
| EPS | Earnings per share | POR | Period of Redemption |
| FASB | Financial Accounting Standards Board | PSA | Public Securities Association |
| FDIC | Federal Deposit Insurance Corporation | SEC | Securities and Exchange Commission |
| FHLB | Federal Home Loan Bank | SOFR | Secured Overnight Financing Rate |
| FHLBB | Federal Home Loan Bank of Boston | The 2020 Plan | The 2020 Equity Incentive Plan |
| FHLMC | Federal Home Loan Mortgage Corporation | The Bank | First National Bank |
| FNMA | Federal National Mortgage Association | The Company | The First Bancorp, Inc. |
| FOMC | Federal Open Market Committee | U.S. | United States of America |
| FRB | Federal Reserve Board | USD | U.S. Dollar |
| FRBB | Federal Reserve Bank of Boston | WSJP | Wall Street Journal Prime |
| GAAP | Accounting principles generally accepted in the U.S. | | |