1、The Components of the System Unit Describe the components in the system unit.Explain how the CPU processes data.Differentiate among the various types of memory.Explain the difference between a serial,a parallel,and a USB port.Case that contains electronic components of the computer used to process d
2、ata.Main circuit board in system unit.Contains adapter cards,processor chips and memory chips.n Interprets and carries out the basic institutions that operate a computer.Control unit directs and coordinates operation in the computer.Arithmetic logic unit(ALU)performs arithmetic,comparison,and logica
3、l operations.n Also called the processor.separate statesonoff10 Use a binary system to recognize two states.Use number system with two digits:0 and 1 called bits.ASCII-America Standard Code for Internet Interchange EBCDIC-Extended Binary Coded Decimal Interchange CodeTermAbbreviationSizeKilobyteKB o
4、r K1024 bytesMegabyteMB1 millionGigabyteGB1 billionWhen computers power is turned offVolatile memoryNonvolatilememoryRAMROMCMOS Common adapter cards:MIDI card Sound card Video card Modem card Network card serial ports a kind of interface connects devices to system unitparallel ports interface connec
5、ts by transferringUSB ports connect up to 127 different peripheralspower supply:changes the wall outlet AC power into DC power.fan:keeps components of the system unit cool What it is important when you buy a computer?To understand how the components of the system unit work.How will the system unit e
6、ffect?They will have an effect on the speed and power of a computer.MIDI card Sound card Video card Modem card Network card 1.The interprets and carries out the basic instructions that operate a computer.A.system unit B.motherboard C.memory D.processor2.have conditions along with operators such as AND,OR and NOT.A.Arithmetic operations B.Logical operations C.Comparison operations D.All of aboveDB
