A search engine is a database of websites. Each search engine has a dedicated spider that regularly crawls the net. Search results are displayed according to the keywords entered by internet users. A directory is catalogue of websites classified by categories. Unlike search engines, submitted websites are reviewed by a human editor.
A crawler is the bot that crawls a site to rank it and or submit it into a search engine. A directory search engine is a website that has websites listed on it and allows you to search for what you are looking for inside of the directory.
Ask com is a search-engine which in my experience primarily finds advertisements for companies, as a business directory. It is not a forum like Answers.
difference schematic diagram between carnot heat engine and heat engine
difference between 2.5 and 3 liter engine is .5 of a liter
What are the differences between a 350 and a 454 engine?
It it not quite clear for most people what is the difference between Google and yellow pages. Well, Google its the world's biggest search engine, yellow pages its a local business directory. This huge difference seams to be confusing for most of business owners and definitely hurt their online advertising goals. If you are looking to promote your business to a local mass clientele, I don't see why one choose to list it business on a local directory.
The main difference between a diesel and a steam engine is the diesel engine is an internal combustion and the steam engine is external combustion.
same
a engine runs a machine
The difference is the overall size of the engine. A 318 is a 5.2 liter engine. A 360 is a 5.9 liter engine.
Almost no difference at all. There would be no noticeable difference in the engine.