1. Embedded Web Technology (EWT)
This is a new technology that uses the Internet in real time to control/interact with a device which contains an embedded system/microprocessor. The user needs to be authorised to do this and can control a device anywhere using a web browser (e.g. from a computer or even a mobile phone which is web-enabled).
Example: An oven contains an embedded processor. The owner can use a web-ready mobile phone anywhere to control the oven remotely. By accessing a web site he is able to send instructions to control the oven.

2. Global Positioning Satellites (GPS)
Global positioning satellite (GPS) systems are used to determine the exact location of a car, airplane, ship or any conveyance which travels from one place to another. In vehicles these systems are often referred to as satellite navigation systems (sat nav).

4. Satellites in outer space transmit signals to the Earth
Satellites in outer space transmit signals to the Earth. Computers in vehicles (e.g. car, airplane or ship) receive and interpret these signals. Positioning depends on very accurate timing – atomic clocks are used because of their accuracy to within a fraction of a second per day. Each satellite transmits data indicating its position and time. The computer in the vehicle calculates its location based on the information from at least three satellites