Computer Hardware Devices

Communication between computer and a keyboard involves Simplex transmission.

Simplex communication is a communication channel that sends information in one direction only. The International Telecommunication Union definition is a communications channel that operates in one direction at a time, but that may be reversible; this is termed half duplex in other contexts.

An advantage of half-duplex is that the single track is cheaper than the double tracks. A full duplex communication channel is able to transmit data in both directions on a signal carrier at the same time. It is constructed as a pair of simplex links that allows bidirectional simultaneous transmission.

A special type of device which uses an ordinary telephone with a computer is Acoustic couple

In telecommunications, an acoustic coupler is an interface device for coupling electrical signals by acoustical means—usually into and out of a telephone.

Ethernet modems that plug into the network card in the computer, and wireless modems that connect to a computer using a wireless LAN (WLAN). Some modems offer dual Ethernet and USB connection. There are also routers with integrated ADSL modem.

A TTY is a special device that lets people who are deaf, hard of hearing, or speech-impaired use the telephone to communicate, by allowing them to type messages back and forth to one another instead of talking and listening.

M-commerce means mobile commerce i.e. commercial activities that takes place electronically by PDAs i.e. mobile phones. M-commerce enables users to access internet without finding a place to plug in. These transactions include purchasing stocks, remitting money etc. this service is often referred as mobile banking.

Visual display terminal most popular input device used today for interactive processing & for the on line entry of data for batch processing.

A video display unit (VDU) consists of: A computer output device that uses a cathode ray tube or other technology to present visual images. One or more input devices, such as a keyboard , a mouse , or both. A synonym sometimes used in the United States is video display terminal ( VDT ).

A video display unit (VDU) consists of: A computer output device that uses a cathode ray tube or other technology to present visual images. One or more input devices, such as a keyboard , a mouse , or both.

This is a location-specific question about a specific lab environment. Without access to the physical lab, this is based on the provided answer key.

A monitor displays information processed by the computer, making it an output device. Input devices, such as keyboards or mice, send data to the computer.

The data storage structure are also called as data tables, which are created as a part of structuring database for accounting.

A keyboard and a mouse are the standard, most widely used hardware devices for entering data and commands into a computer.

Input unit controls various input devices which are used for entering data into the computer system. Keyboard and mouse, for instance, are the most commonly used input device. Other such devices are magnetic tape, magnetic disk, light pen, optical scanner etc.

There are devices which respond to voice and physical touch. A menu layout is displayed on a touch sensitive screen. Whenever user touches a menu item on touch-screen, the computer senses which particular menu item has been touched and accordingly performs the operation associated with that menu item.

A fax(short for facsimile and sometimes called tele-copying) is the telephonic transmission of scanned-in printed material(text or images), usually to a telephone number associated with a printer or other output device. The original document is scanned with a fax machine, which treats the contents(text or images) as a single fixed graphic image, converting it into a bitmap. In this digital form, the information is transmitted as electrical signals through the telephone system. Faxes can also be sent and received through computers.

A computer runs programs, and an iPad runs apps. This is a relationship between a device and the software it executes.

A gadget is a small, often mechanical or electronic, tool designed for a specific purpose. An app is software, and a calculator is a specific type of device.

Digital devices are Digital Clock.

All data that a computer processes must be encoded digitally, as a series of zeroes and ones. The opposite of digital is analog. A typical analog device is a clock in which the hands move continuously around the face. ... Most analog events, however, can be simulated digitally.

Digital clocks typically use the 50 or 60 hertz oscillation of AC power or a 32,768 hertz crystal oscillator as in a quartz clock to keep time. Some timepieces, such as many digital watches, can be switched between 12-hour and 24-hour modes.

The earliest patent for a digital alarm clock was registered by D.E Protzmann and others on October 23, 1956, in the United States. Protzmann and his associates also patented another digital clock in 1970, which was said to use a minimal amount of moving parts.