This study is prepared to find the computer based banking services that currently several banks are providing to their customers. This book contains the introduction part; Background of the report, Origin of the Report, purpose, objective and scope of the report is given. Then the Methodology and some limitations are given. Online banking and its history, features, Security, Attacks, Counter measures have been discussed. Then discuss about the Automated Teller Machine (ATM). In this part discussed about its history, Location, financial networks, global use, hardware, software, security,...