Excluded Search Engines

The aim of this collection is a general overview of web search engines, so I exclude SeEn for a single Database, a single Website or a pure Webdirectory. This are interesting tools but they don't search the web.

Product Search Engines

like the Google Product Search or the flight search Kayak uses product catalogs (not websites) and makes them searchable on a single point. The catalogs usually contains highly structured data, so the SeEn can offer a very special search (like comparing prices or searching for flight by date, time and so on).
For more information about Product SeEn see: Lewandowski, Dirk: Spezialsuchmaschinen: – In: Handbuch Internet-Suchmaschinen: Nutzerorientierung in Wissenschaft und Praxis. / Dirk Lewandowski (Hrsg.). - Heidelberg: AKA, 2009, S. 53-69. Retrieved from HAW Hamburg - Department Information Web site //Buchkapitel: Online here, especially page 67.

Local Search Engines

use the geographic position of the user to offer information about this region (like restaurants, tourist attractions and more, e.g. Goby). They are very fascinating advertising tools, especialy in a more and more mobile web. But though they offered a web search in the beginning, today they primary use external information from commercial directories, yellow pages and so on.
For more information about Local SeEn see: Lewandowski, Dirk: Spezialsuchmaschinen: – In: Handbuch Internet-Suchmaschinen: Nutzerorientierung in Wissenschaft und Praxis. / Dirk Lewandowski (Hrsg.). - Heidelberg: AKA, 2009, S. 53-69. Retrieved from HAW Hamburg - Department Information Web site //Buchkapitel: Online here, especially page 61/62.

Search Engines from the Crawler Network

They wrote about themself: »The Crawler Network is an online media and technology company that provides relevant content, advertising and technology solutions for advertisers and publishers of all sizes. Crawler Network's distribution network is designed to maximize advertiser ROI via owned and operated properties, carefully chosen and monitored syndicated publishers, and search engine partners. The company's owned and operated search engines and web tools offer consumers essential search results and a more personalized web experience. The Crawler Network is set apart from competitors by offering specialist Search Engines in niche fields providing better targeted search results to the end user.

There are currently over 40 Specialist Search Engines in the Crawler Network portfolio representing the following industries; Anime, Art, Articles, Baby, Books, Business, Cars, Cities, Clothing, Computers, Countries, Credit, Education, Finance, Food, Health, History, Hotels, Insurance, Jobs, Lawyers, Legal, MLM, Mortgage, Movies, Music, Natural Therapy, Pets, Real Estate, Recreation, Restaurants, Science, Services, Sports, State, Supply, Tickets, Travel, TV Shows, Video Games, Weather, Weddings.« (Source, an overview of all Special SeEn you find here.)

Next too the Special SeEn they offer countless Regional SeEn from Aland Islands Crawler too Zaire Crawler (An overview of all Regional SeEn you find here.).

Although the quality of a SeEn isn't a relevant criteria in this collection I descided to exclude this search engine mass production.

Google Custom Search Engines

The Google Custom Search Engines in short CSE is a faszinating easy to use tool for creating your own search engine. Information about the CSE you find for example here: Custom Search Engine - Google, Wikipedia: Google Custom Search or Google Custom Search Blog. An first overview of the mass of CSE offers the The Directory of Google Custom Search Engines.

At the moment I desided to exclude this SeEn. First I think it isn't possible to collect them all and second I'm not sure if this didn't give a wrong picture in a statistical point of view. Me personaly create some of this CSE just to test the functionality and for some of my projects.
I know there are some realy wonderfull CSE, so I think about an extra collection of selected CSE. A first collection you find in the SearchEngineArchive Notes Blog.