Commercial Bancshares Services, also known as C|B|S, is a regional provider of banking information technology, data processing and other information technology-related products and services to the community banking industry. Its products and services include core data processing, Internet banking, overdraft privilege program, statement and document imaging, ATM sales and Web site development. Commercial Bancshares Services is a part of Citizens Bank ACH, which is a full-service financial institution that specializes in providing a variety of personal and business banking products and services. It offers cash management and financial planning services. Citizens Bank ACH provides a range of savings and checking accounts. Commercial Bancshares Services is located in Birmingham, Ala.