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The cpu is the most important component in a computer

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The CPU is the most important component in a computer.In the earliest computers, CPUs were huge devices madeof electrical and mechanical components such as vacuumtubes and switches.Today, CPUs are small chips known asmicroprocessors.
CPEN 21_Programming Logic and Design- Introduction to Computers and LogicPage4of123. Output -After data items have been processed, the resulting informationusually is sent to a printer, monitor, or some other output device so peoplecan view, interpret, and use the results.II. STORAGE DEVICESMain MemoryMain memory is where the computer stores a program while the programis running.Main memory is commonly known asrandom-access memory or RAM.RAM is usually volatile type of memory that is used only for temporarystorage while a program is running.When the computer is turned off, the contents of RAM are erased.Secondary Storage DevicesSecondary storage is a type of memory that can hold data for longperiods of time, even when there is no power to the computer.Programs are normally stored in secondary memory and loaded intomain memory as needed.The most common type of secondary storage device is thedisk drive.Adisk drivestores data by magnetically encoding it onto a circular disk.External disk drivescan be used to create backup copies of importantdata or to move data to another computer.Afloppy disk driverecords data onto a small floppy disk, which can beremoved from the drive.Floppy disks hold only a small amount of data, are slow to access data,and are sometimes unreliable.USB drivesare small devices that plug into the computer’s USB(universal serial bus) port, and appear to the system as a disk drive.They store data in a special type of memory known as flash memory.USB drives, which are also known as memory sticks and flash drives,are inexpensive, reliable, and small enough to be carried in your pocket.Optical devicessuch as the CD (compact disc) and the DVD (digitalversatile disc) are also popular for data storage.
CPEN 21_Programming Logic and Design- Introduction to Computers and LogicPage5of12CD and DVD drives use a laser to detect the pits on disc surface andthus read the encoded data.Optical discs hold large amounts of data, and because recordable CDand DVD drives are now commonplace, they are good mediums forcreating backup copies of data.III.HOW THE COMPUTER STORE DATAAll data that is stored in a computer is converted to sequences of 0s and1s.A computer’s memory is divided into tiny storage locations known asbytes.Each byte is divided into eight smaller storage locations known as bits.The term bit stands for binary digit.A. Storing NumbersA bit that is turned off represents the number 0 and a bit that is turnedon represents the number 1.The position of each digit in a binary number has a value assigned to it.B. Storing CharactersAny piece of data that is stored in a computer’s memory must be storedas a binary number that includes characters, such as letters andpunctuation marks.

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Term
Spring
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Binary numeral system, USB flash drive, Computer program

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