作者:empty 页数:312 出版社:empty |
Digial computers are much faster than analog computers and thecomputa in sarefurmoteaccurmcTheycopocket size to large systems which oce up y few normal-sized ro.aocomputers can he designed ether for special or for general purposesAnother ype of computer which com hines the sale nt fca tures of both analogand digital computers.is referred tons Hybrid computer.It is faster than analogEvaluation Warning:The document was created wih Spire.PDF for.NE
repsentative ozation of aer mputer system maybe as shown in Fig 1.1.The inputdevice supplies'data, asfrom us, to the computer.Mostgoy used in pes are:tel etrr iter and cathode ray tube(In theast, it used to be cardare convertedform whir hthstored in the cputer in binary form(sce later) (The conversion to the bin arform is perf ond with the help of c lectrothe coputer has processed the dchumaI additon to encoders and decode n, there are other eectroniceieuitsasa
They requred es power to open te They were mue hns arereliable as compared to the first generation computers.Second generationsuch as Fortran, Cobol and other uti itty programSeveral companies stir led mUNIVAC I IL.and several othersThird Gener union(~1965-1975)The third generation computersintegrated circuits(electronic cir eu itsleads to several advi size an diner eased process ig speed(~operations/second) .()re reli abi ity and higher accuracy, (il) easyvery large storage capas wid comaybe used with them.They hive highly sap his ticated opera ing systems.aplifonsowarcandpacle.6700/7700senesCDC 6000/7000seres, dii ul equipme at PDP-8/11seneUNIVAC 1108/ 9 series, ICL 1900/ 2900 series.and soon.Four zh Generation(-1972-1982)minicomputers, magnet ie ink readers, a ser printers, opt cal readers, audiresponse terminals, ete.can be attached to them.Some er amples of fourthgeneration computers are IBM 370, AM A DAHL 470.CRAY XMP.CYBERand many other systemsFifa h Gene run on and Beyond (-1981 onwards)of problem whose alpo thm can be described explicitly.However.si there areEvaluation Warning:The document was created with Spire.PDF for.NE