User:Lasertrimman/Books/Hart & OSI

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 * Highway Addressable Remote Transducer Protocol
 * Universal asynchronous receiver/transmitter
 * Frequency-shift keying
 * Continuous phase modulation
 * Current loop
 * Modem
 * Parity bit
 * Open Systems Interconnection
 * OSI protocols
 * Physical layer
 * Data link layer
 * Application layer
 * Network layer
 * Transport layer
 * Session layer
 * Presentation layer