Structures
  DriveGeometry, 309
  EClockVal, 287
  GamePortTrigger, 92
  GamePortTrigger, 107
  IEPointerPixel, 106
  IEPointerTablet, 106
  InputEvent, 91, 104, 106, 110
  Interrupt, 106
  IOAudio, 16
  IOClipReq, 37
  IODRPReq, 175
  IODRPReq, 187
  IOExtPar, 161
  IOExtSer, 267
  IOExtTD, 305
  IOExtTD, 305
  IOPrtCmdReq, 175
  IOStdReq, 103, 175, 249
  mouth_rb, 133
  narrator_rb, 133
  PrinterData, 181
  PrinterData, 197
  PrinterExtendedData, 181
  printerIO, 175
  PrinterSegment, 196
  SatisfyMsg, 40
  SCSICmd, 251
  timerequest, 103, 112, 113, 287
  timeval, 287