acoustically-coupled modem

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• Modem — For other uses, see Modem (disambiguation). A modem (modulator demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The… …   Wikipedia

• John van Geen — was a researcher at the Stanford Research Institute who was known for his advances in the acoustically coupled modem. His enhancments allowed the designed receiver to detect data (in the form of bits) and distinguish it from background noise more …   Wikipedia

• Time-sharing — refers to sharing a computing resource among many users by multitasking. Because early mainframes and minicomputers were extremely expensive, it was rarely possible to allow a single user exclusive access to the machine for interactive use. But… …   Wikipedia

• Novation CAT — The original Novation CAT Novation was an early modem manufacturer whose CAT series were popular in the early home computer market in the late 1970s and early 1980s, notably on the Apple II. The Hayes Smartmodem 300, introduced in 1981, helped… …   Wikipedia