ways+in+witch+IT+is+used

Notes:
 * Communication** is the activity of conveying meaningful information. Communication requires a sender, a message, and an intended recipient, although the receiver need not be present or aware of the sender's intent to communicate at the time of communication; thus communication can occur across vast distances in time and space. Communication requires that the communicating parties share an area of communicative commonality. The communication process is complete once the receiver has understood the message of the sender.

What is an expert system? An expert system is a computer program that simulates the judgement and behavior of a human or an organization that has expert knowledge and experience in a particular field. Give three examples of when expert systems are used?
 * Information Technology has five main applications **
 * 1. Communication - posters, cartoons, websites, multimedia presentations **
 * 2. Data handling - E.g surveys, address books, school reports, libraries- Mainly performed using databases **
 * 3. Measurement - scientific experiments, environmental monitoring. Sensors collect information in analogue format which is then converted into digital for the computer. **
 * 4. Control - washing machines, cookers, traffic lights, burglar alarms **
 * 5. Modelling - 3-D modelling, simulations (flight or driving), use of spreadsheets for personal or tuck shop finance **
 * Medical diagnosis** (the knowledge base would contain medical information, the symptoms of the patient would be used as the query, and the advice would be a diagnose of the patient’s illness)

Playing **strategy games** like **chess** against a computer (the knowledge base would contain strategies and moves, the player's moves would be used as the query, and the output would be the computer's 'expert' moves)

Providing **financial advice** - whether to invest in a business, etc. (the knowledge base would contain data about the performance of financial markets and businesses in the past) How is expert system created