Maryland Statutes
Subtitle 3 - Uniform Preservation of Private Business Records Act
Section 1-301 - "Business Record" Defined

In this subtitle, “business record” includes:
        (1)    a book of account;
        (2)    a canceled check;
        (3)    a document;
        (4)    a letter;
        (5)    a payroll;
        (6)    a production report or other record that relates to equipment, personnel, or sales; and
        (7)    a voucher.