This Windows application software (App) is a HTML eBook which puts circuit knowledge at your fingertips. It contains 10,000+ circuits with design formulas supported by mathematical explanations that go deeply down to the basic levels through quick HTML links. Searching a circuit in this eBook is extremely fast. It’s a great reference tool for engineers or hobbyists. It runs on any Windows operating system. It’ll be delivered via the Google Drive with a download link. Email address is required for the order.