6502.................................................... 18.5 ADB..................................................... 18.4 Apple Desktop Bus....................................... 18.4 blocking................................................ 18.3 blue screen of death.................................... 18.2 contact pad............................................. 18.1 controller.............................................. 18.5 device drivers.......................................... 18.5 dip switches............................................ 18.1 end of file flag........................................ 18.2 IN...................................................... 18.1 interblock gaps......................................... 18.3 interoperability........................................ 18.1 I/O instructions........................................ 18.1 isolated I/O............................................ 18.7 memory-mapped I/O....................................... 18.7 multiplex............................................... 18.6 OUT..................................................... 18.1 peripheral.............................................. 18.1 plug 'n' lay............................................ 18.1 polling................................................. 18.2 port number............................................. 18.1 protocol................................................ 18.4 round robin............................................. 18.6 SCSI.................................................... 18.4 Small Computer Systems Interface........................ 18.4 statistical multiplexing................................ 18.6 time division multiplexing.............................. 18.6 TOS..................................................... 18.1 Universal Serial Bus.................................... 18.4 UNIX.................................................... 18.5 USB..................................................... 18.4