Hi all
need help
can any one of you explain this to me pls.


>>>>
Note that all that is required for assembly language programming is the MPLAB
software package which is available for free from the Microchip home page
and a PIC programmer, and of course some PIC16F84 and 4.0 MHz ceramic
resonators.
<<<<<<<<<


I need to know what exactly is ceramic resonators?

Thanks in advance


s+