ELOG Electronic Web Logbook is an electronic diary with a Web interface in it. It can be used to preserve the personal or shared logbooks, with the capability for adding any attachments to logbook pages. Logbook entries can be also be classified with the user-defined classes, and doubt of using any filters on these classes. Mechanical email warning can also be produced on new entries based on the classes. The ELOG server is a little stand-alone C program, which runs in Linux and Windows. The logbooks are also preserved in plain ASCII files for easy and fast access to the web.