Seeking Efficient Search Algorithm

Hello,

I am a C programmar and seek the help of you people in aknowledge of some efficient searching algorithm.
kindly don't mention B,B+Tree algorithms.
Thanks.

-ijaz

For searching what, looking for what?

You did not mention what type of data you are searching. Is it a large single dimension or multi-dimension array? Is it characters or numbers? Is it sorted? etc...