1) Online Course Registration System should be implemented to become a web-based registration software that guides students to the registering for an online event or towards course acceptance. The one-class online course registration system is ideal for educational camps, adult schools, corporate training programs, sports camps, and online training programs. Online course registration software involves features like email-based user accounts, security, auto-scheduling, credit card payment, registration deadline, fee collection late and the deadline for several courses. Additionally, the online course registration system can be fully customized according to your needs.2)ager3) Green computing is about the efficient and environmentally friendly design, manufacturing, operation and disposal of environment of IS related products, including all types of computers, printers and printing equipment. Computers contain many toxic substances, including beryllium, brominated flame retardants, cadmium, lead, mercury and selenium. As a result, electronics manufacturing employees and suppliers, at all stages of the supply chain and manufacturing process, are at risk of unhealthy exposure. It is impossible to guarantee safe recycling or disposal, so it is best to eliminate the use of toxic substances. However, recycling companies export large quantities of used electronics to companies in underdeveloped countries. Disposal and recovery operations must be extremely careful to avoid hazardous exposure during recycling operations and leaching of materials such as heavy metals from landfills and incinerator ash. Burning computer components also releases toxic components into the atmosphere, with harmful results for people who burn in the short...... middle of paper ......us that contains malicious files, including a keylogger, which collects every keystroke you make on your computer. To create an effective virus, many hackers usually encrypt their virus. This increases the chances that the virus will not be detected by antivirus software used by the victim. In order to spread the virus, hackers download fake files relating to something completely different that might interest the victim. Once the victim downloads the selected file, they are now infected with the Trojan. Common sites used by hackers are Pirate Bay, a database of torrents ranging from images to full movie downloads. Hackers take advantage of torrent sites by infecting the file with their Trojan. This is the most common method of infecting someone with a virus, but there are dozens of other ways..