(i) POST (Power-On Self-Test) is the diagnostic testing sequence that a computer's basic input! output system runs to determine if the computer keyboard, random access memory, disk drives and other hardware are working correctly.
(ii) If the necessary hardware is detected and found to be operating properly, the computer begins to boot.

(i) IC is short for Integrated Circuit or Integrated Chip.
(ii) The IC is a package containing many circuits, pathways, transistors, and other electronic components all working together to perform a particular function or a series of functions.

Monitor:
(i) Monitor is the most commonly used output device to display the information. It looks like a TV.
(ii) Pictures on a monitor are formed with picture elements called PIXELS.
(iii) Monitors may either be Monochrome which display text or images in Black and White or can be color, which display results in multiple colors.
(iv) There are many types of monitors available such as CRT (Cathode Ray Tube), LCD (Liquid Crystal Display) and LED (Light Emitting Diodes).
(v) The video graphics card helps the keyboard to communicate with the screen.
(vi) It acts as an interface between the computer and display monitor.

(i) In the Sixth Generation, computers could be defined as the era of intelligent computers based on Artificial Neural Networks.
(ii) One of the most dramatic changes in the sixth generation will be the explosive growth of Wide Area Networking.
(iii) Natural Language Processing (NLP) is a component of Artificial Intelligence (AI).
(iv) It provides the ability to develop the computer program to understand human language.

Impact printers:
(i) These printers print with striking of hammers or pins on ribbon. These printers can print on multipart (using carbon papers) by using mechanical pressure.
For example, Dot Matrix printers and Line matrix printers are impact printers.
(ii) A Dot matrix printer that prints using a fixed number of pins or wires.
(iii) Line matrix printers use a fixed print head for printing.

(i) Plotter: Plotter is an Output device that is used to produce graphical Output on papers. It uses single colour or multi-colour pens to draw pictures.
(ii) Speakers: Speakers produce voice output (audio). Using speaker along with speech synthesize software, the computer can provide voice output.
(iii) Multimedia Projector: Multimedia projectors are used to produce computer output on a big screen. These are used to display presentations in meeting halls or in classrooms.

Input device is used to feed any form of data to the computer, which can be stored in the memory unit for further processing.
Example: Keyboard, mouse, Scanner, Fingerprint scanner, Track Ball, Retinal Scanner, Light pen etc.

The various applications of computer.
(i) Business
(ii) Education
(iii) Marketing
(iv) Banking
(v) Insurance
(vi) Communication
(vii) Healthcare
(viii) Engineering - Robotics, Nano technology, Bio Engineering

(i) Computer is the powerful machine.
(ii) It can perform large number of tasks.
(iii) The main capacities of computer are work length, speed accuracy, diligence, versatility memory and automation and lots of more tasks.