The interface is a bit confusing but it does offer quite a bit of flexibility. Most users are familiar with search engines like Lycos and Infoseek. Mamma is unlike such search engines. Mamma is what we call a smart meta search engine. This search will query the top search engines on the Web and create a virtual database.
Mamma offers simultaneous coverage of the major search engines in one simple query.
Mamma analyzes your queries and properly formats the words and syntax for each source it probes. So you no longer have to remember the syntax for each search engine. Mamma will then organize the results into a uniform format, and presents them by relevance and source. Mamma will also allow users to use any type of search syntax so you don't need to learn a special syntax. Moreover, Mamma can include special syntax by itself for queries that are not correct.