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CPU and its Function

#CPU A central processing unit (CPU), also called a central processor or main processor, is the electronic circuitry within a computer that executes instructions that make up a computer program. The CPU performs basic arithmetic, logic, controlling, and input/output (I/O) operations specified by the instructions in the program. The computer industry used the term "central processing unit" as early as 1955.[1][2] Traditionally, the term "CPU" refers to a processor, more specifically to its processing unit and control unit (CU), distinguishing these core elements of a computer from external components such as main memory and  I/O circuitry #Types Types of CPUs In the past, computer processors used numbers to identify the processor and help identify faster processors. For example, the Intel 80486 (486) processor is faster than the 80386 (386) processor. After the introduction of the Intel Pentium processor (which would technically be the 80586), all computer processors started using names like Athlon, Duron, Pentium, and Celeron. Today, in addition to the different names of computer processors, there are different architectures (32-bit and 64-bit), speeds, and capabilities. Below is a list of the more common types of CPUs for home or business computers AMD processors K6-2 K6-III Athlon Duron Athlon XP Sempron Athlon 64 Mobile Athlon 64 Athlon XP-M Athlon 64 FX Turion 64 Athlon 64 X2 Turion 64 X2 Phenom FX Phenom X4 Phenom X3 Athlon 6-series Athlon 4-series Athlon X2 Phenom II Athlon II E2 series A4 series A6 series A8 series A10 series Intel processors 4004 8080 8086 8087 8088 80286 (286) 80386 (386) 80486 (486) Pentium Pentium w/ MMX Pentium Pro Pentium II Celeron Pentium III Pentium M Celeron M Pentium 4 Mobile Pentium 4-M Pentium D Pentium Extreme Edition Core Duo Core 2 Duo Core i3 Core i5 Core i7 Core i9