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, alternative uses, reliability and fraud. Typical push & pull services offered under SMS banking, qualities of SMS banking, technologies employed for SMS banking, in the next part have a short description about Mobile banking. In this portion there is a mobile banking conceptual model, services offered under mobile banking challenges for mobile banking, security, reliability, Personalization. Then there is information about Electronics Funds Transfer (EFT), EFT POS, and Card based EFT, Transaction types, Authorization, Single message Authorization, Authentication.