What are the key components of a computer? Do you know what they are? Because I don't that's for sure! When buying a computer you should no what you are purchasing by comparing before you hand over your $$$. Thats why I searched for the latest and greatest using 2 examples: HP Pavilion a6130a with 19" LCD
HP Pavilion IQ770 with 19" LCD 
Processor: Or Central Processing Unit interprets computer program instructions.
EG: HP a6130a computer has an Intel Pentium dual core processor E2140 1.6GHz .
HP IQ770 computer has an AMD Turion 64 X2 Dual Core processor TL-52 1.6GHz
Ram:Random Access Memory is a type of data storage, which allows stored data to be accessed in any order.
EG: HP a6130a computer has: 512MB DDR2
HP IQ770 computer has: 2048MB PC2-4200 DDR2 SDRAM
Hard drive:Non volatile storage device which stores digitally encoded data on rapidly rotating platers with magnetic surfaces.
EG: HP a6130a computer has:160.0 GB 3G Serial ATA hard drive at 7200RPM
HP IQ770 computer has: 320GB 7200RPM SATA hard drive
Monitor A computer display device.
EG: HP a6130a and HP IQ770 comes with a 19" LCD screen which happens to be the must have Monitor.
USB Ports:USB also known as Universal Serial Bus. The USB gives you a single, standardized, easy-to-use way to connect up to 127 devices to a computer.
EG: HP a6130a has: 2 Hi-Speed USB 2.0 (front access), 2 USB 2.0 (rear access)
EG: HP a6130a has: 2 Hi-Speed USB 2.0 (front access), 2 USB 2.0 (rear access)
HP IQ770 has 2 USB Ports and 1 IEEE 1394 port
Operating System:is a set of computer programs that manage the 
hard drive and software devices of a computer.
hard drive and software devices of a computer. EG: HP a6130a uses the operating system Windows Vista Home Basic which is one of the latest computer programs that varies in 13 different versions.
HP IQ770 uses the operating system Windows Vista Home Premium
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