A small ball that is set in a holder and can be rotated by hand to move a cursor on a computer screen.
A barcode reader (or barcode scanner) is an electronic device for reading printed barcodes. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating optical impulses into electrical ones.
A MIDI keyboard is typically a piano-style user interface keyboard device used for sending MIDI signals or commands over a USB or MIDI cable to other devices connected and operating on the same MIDI protocol interface.
Component Object Model (COM) is a binary-interface standard for software components introduced by Microsoft in 1993. It is used to enable inter-process communication and dynamic object creation in a large range of programming languages.
A Projection panel is a device that, although no longer in production, was used as a data projector is today.
It works with an overhead projector (OHP). The panel consists of a translucent LCD, and a fan to keep it cool. The projection panel sits on the bed of the OHP, and acts like a piece of OHT transparency. The panels have a VGA input, and sometimes Composite (RCA) and S-Video.
A device that is used to project rays of light, especially an apparatus with a system of lenses for projecting slides or film on to a screen.
It has scanner to scan the document and also have printer to Print the document.
A Network interface card, NIC, or Network card is an electronic device that connects a computer to a computer network, usually a LAN. It is considered a piece of computer hardware.
A combined device for modulation and demodulation, for example, between the digital data of a computer and the analogue signal of a telephone line.