The difference in analog & digital buffer

hi all
can you ppl tell me the similarity or difference in Analog & Digital Buffer on the basis of their function.i'm confused coz sometims i read buffers can be used for amplification of signal on the other hand some says it can be used to add delays in clocks.
thanks

take a look at this..

the digital buffer is used as an amplifier as to give the full current sourcing or sinking at the output.. a digital buffer is simply a set of two inverters.

h**p://www.allaboutcircuits.com/vol_4/chpt_3/3.html

h**p://www.national.com/catalog/AnalogBuffers.html
-- as for these analog buffers..analog buffers can also be used for amplicifcations

with regards,

Digital buffers, like what arunragavan has mentioned, are simply 2 invertors. Besides sourcing more current to provide better signal fanout performance, the invertors introduce a slight delay, and hence also used to solve data races.
Analog buffers are essentially voltage followers. Besides providing more current for driving applications, their high-impedance output provides limited signal isolation.

thanks a lot to clear this concept.it really helped me in understanding Buffer