JOY 5ÿÿh� à�[̶k…òI”z ¶kÐ pÐhLâ9̪I” Y÷%Á³Ðz ¶kZ-–K¥Òi´Z-–KLï$ЦI”z ¶{x ULï$ЦI”z ¶zx ULï$ЦI”z ¶yx ULï$ЦI”z ¶xx ULï$ЦI”z ¶x ULï$ЦI”z ¶~x ULï$ЦI”z ¶}x ULï$ЦI”z ¶|x ULï$ЦI”z ¶sx ULï$ЦI”z ¶rx U€ xLayout 0x U ÈpHomeoftheFree LðChapter3ð€ xLayout 0x U ÈP ,p>>>x€ xLayout 0x U Èx€ xLayout 0x U È€€ xLayout 1x U ÈÜ $Layout 1xˆP #(-27affairs,builtbyrealenthusiasts.OnesuchwasWayneRatliffe,a €icomputerengineerattheJetPropulsionLaboratoryinPasadena,workingontheVikingMarsLanderproject. U>By1979,VisiCalcwasbeginningtomakeitsmark,theinfant  /CP/Moperatingsystemwasbeginningtogainrecognitionand,inthe  L5backpagesofBYTEmagazine,asmalladvertisementappearedfora}programcalledVULCAN. @)VULCANwasthebrainchildofWayneRatliffeand,ayearlater   andwiththehelpofaMr.GeorgeTate,wasre-launchedasdBaseII.fTherestishistory.....  DBaseisactuallyaprogramminglanguage,ratherthanstrictlya  ¨‘databasemanager.Whereitscoresisinitsabilitytohandle  relationshipsinamulti-dimensionaldatamatrix.LetmeexplainthisRfurther.... Considerthatatableisatwo-dimensionaldatabase,wheredata  O8canbestrictlydefinedasarelationshipbetweenonerowandoneƒcolumn. ;$Card-indextypedatabasesaddanextradimensiontothis,but  ¼¥dBaseisabletoactuponrelationshipsbetweenanumberofûthree-dimensionaldatasets.  Thismakesitaverypowerfultoolandit'sapplicationrangeis#vast.IhaveevenseendBaseapplicationsthatemulatespreadsheets! Å®Becauseitissopowerful,itisnoteasyforanovice  <%programmertogettogripswith.Moreover,thenatureofthebeast  P9meansthatitmaywellbeusedbysomeonewhoisnotexperiencedþwithcomputers. J3ThestandardmethodofwritingdBaseapplicationsistohave  A*themoperatewithina'shell'.Thenon-programmerjusttypesin'Do  Menu'atthedBasepromptandtheshelltakescontrol.Thereafter,all  YBdBaseoperationistransparenttotheuser(thatis,theyarenotH€x€$Layout 1xˆP #(-27'CPMBBUKvol.66isonesuch,butnewapplicationsandutilitiesare€beingaddedregularly.ÉOtherapplications .Ifyoudon'tfeelthatyoucanjustifytheexpenseofthereal  t]dBaseIIpackage,thereisadatabasepackageonSIG/Mvol.248,8€x€$Layout 1xˆP #(-27