Introduction to Headphones History : headphones was created in the late 1800s for telephone operators, using ear tubes to listen to audio signals. However, Nathaniel Bal…

Introduction to Fax (Facsimile) What is a Fax? A fax (short for facsimile) is a method of sending and receiving printed documents over a telephone line. How It Works: A …

Introduction to Google Glass What is Google Glass? Google Glass is a wearable smart device that resembles traditional eyeglasses but features a small display, allowing u…

Introduction to Computer Output Microfilm (COM) What is COM? Computer Output Microfilm (COM) is a method of storing digital data onto microfilm for archival and long-ter…

Introduction to SGD: Speech Generating Device What is an SGD? A Speech Generating Device (SGD) is a communication tool that helps individuals who have difficulty speakin…

Introduction to OLED: What is OLED? OLED stands for Organic Light Emitting Diode. It’s a display technology that uses organic materials to produce light when electrici…

Introduction to Plotter: A plotter is a type of printer that prints vector graphics. A plotter is a special printer that creates high-quality drawings and graphics. Unli…

Introduction to Printers What is Printer? Printer is an output device which is used to produce hard copy of computer data. Classifications of Printers Printer can be cla…

LCD, LED and Plasma Introduction LCD (Liquid Crystal Display) How it Works: Uses liquid crystals that change with electric currents, illuminated by a backlight. Example…

Cathode Ray Tube (CRT): CRT stands for Cathode Ray Tube. CRT is a technology used in traditional computer monitors and televisions. The image on CRT display is created b…