Nouns

(n)processora business engaged in processing agricultural products and preparing them for market
(n)processorsomeone who processes things (foods or photographs or applicants etc.)
(n)central processing unit, CPU, C.P.U., central processor, processor, mainframe(computer science) the part of a computer (a microprocessor chip) that does most of the data processing“the CPU and the memory form the central part of a computer to which the peripherals are attached”