Almostalloftoday'scomputersystemsaddanadditionalparttotheinformationsystem.Thispart,calledconnectivity,typicallyusestheInternetandallowsuserstogreatlyexpandthecapabilityandusefulnessoftheirinformationsystems.Inlargecomputersystems,therearespecialistswhowriteprocedures,developsoftware,andcapturedata.Inmicrocomputersystems,however,endusersoftenperformtheseoperations.Tobeacompetentenduser,youmustunderstandtheessentialsofinformationtechnology(IT),includingsoftware,hardware,anddata.