Microprocessor
The program counter in a 8085 micro-processor is a 16-bit register, because

 It facilitates the user storing 16-bit data temporarily
 It has to fetch two 8-bit data at a time
 It counts 16-bits at a time
 There are 16 address lines

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Microprocessor
FPGA means

 Forward Programmable Gate Array
 Field Programmable Gate Array
 Field Parallel Gate Array
 Forward Parallel Gate Array

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