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computer (PARTS OF COMPUTER (input device(keyboard, mouse), output device…
computer
PARTS OF COMPUTER
input device(keyboard, mouse)
output device (monitor,speaker)
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expansion cards (video card, sound card or NIC)
hard drive ports and connections ( USB , Firewire)
storage devices ( hard disk, flash drive, CD-ROM,DVD-ROM)
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TYPE OF COMPUTER
Laptop
-lightweight personnel computer ,small and portable,batteries that can be recharged.
Handheld
-managing personal data,perform basic word-processing activities and help to access the internet.
Desktop
-Made up of individual component (monitor,keyboard,
system unit, printer)
-Not portable
-Can run continuously for long periods of time.
-Have more memory, larger hard disk,more port.
Tablet
-Do not need keyboard and mouse,use the tablet pen as mouse function.
ROLE OF MEMORY
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Nonvolatile memory
-the content stored on this type of memory is retained after the computer is turned off.
TERMS USED TO MEASURE MEMORY CAPACITY
-Bit--------------------smallest unit
-Byte-----------------combine of 8 bits
-Kilobyte------------1KB = 1024 byte
-Megabyte----------1MB=1024 KB
-Gigabyte-----------1GB=1024 MB
-Terabyte-----1terabyte=1024 GB
COMPUTER PERFORMANCE
CPU speed
-perform task, such as moving data to and from RAM or performing numerical calculation.
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