thanks for your reply! Now, I'm actualling trying to use the SPI capabilities of the 16F88 that will be connected to an arduino. To my understanding, when data is transfered, it is in <binary>? but my questions is, in my programming compiler, do i use the same keywords with the values needed so that the master/slave can communicate?

I am trying to understand, how is it that I can tell pic A to send this array of information (say a Keypad Code Input of 1,2,3,4) and send it to pic B who is the slave, which then will do something else, and returns a high value or confirmation to pic A that code is verified -> please do this, this and this...

My professor just tells me about it being sent across as data on the same baud rate/frequency but i dont understand how this 2 diff pics can understand diff languages..

Any explanation at all, would be greatly appreciated! this forum definitely has really talented and helpful forumers!