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Learn about the evolution of Internet access from dial-up to broadband, and the different networking technologies used to connect devices to the Internet. Find out how MOSFET, laser, and fiber-optic technologies have enabled faster and wider Internet access.
Learn about the hardware pieces on a computer that connect external devices, such as another computer, a peripheral device or network equipment. Find out the types, shapes, colors and functions of various computer ports, such as USB, FireWire, DVI, VGA, etc.
A computer is a machine that can be programmed to automatically carry out sequences of arithmetic or logical operations. Learn about the etymology, history, types and functions of computers, from ancient devices to modern digital electronic computers.
A server is a computer that provides information or services to other computers called clients on a network. Learn about the history, operation, and purpose of different types of servers, such as web, database, file, and application servers.
A computer network is a set of computers sharing resources located on or provided by network nodes. Learn about the history, types, features, applications, and metrics of computer networks from this comprehensive encyclopedia article.
COM port is the original name of the serial port interface on PC-compatible computers. Learn about the history, I/O addresses, and implementations of COM ports, and how they differ from USB and parallel ports.
Learn about the history and design of vacuum-tube computers, the first generation of electronic computers that used vacuum tubes for logic circuitry. Find out how vacuum tubes enabled high-speed computation, large memories, stored programs, and other innovations in digital computing.
Data Carrier Detect (DCD) or Carrier Detect (CD) is a control signal present inside an RS-232 serial communications cable that goes between a computer and another device, such as a modem. This signal is a simple "high/low" status bit that is sent from a data communications equipment (DCE) to a data terminal equipment (DTE), i.e., from the modem ...