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Topic :   Installation

Learning outcomes : At the end of the lesson, student should be able to:

• Know about the safety of handling PC components
• List the components and tools needed to assemble a PC
• PC Pre Assembling
• Before assembling a PC, we should know the importance of safety in handling computer components 

http://www.alertdisastercontrol.com/

WEB-BASED APPLICATIONS

Technological advancements in large database development and high speed digital transmission networks will result in global information systems. These developments will influence how people interact with information.Through the Internet, a user can get fast responses and have two-way communication using video conferencing and e-mail.

By using the global information systems, people from all over the world can be equipped with knowledge in many areas.

GLOBAL INFORMATION SYSTEM

Web-based applications are delivered to users from a Web server over the Internet. Web-based applications store information in a database system such as Microsoft SQL Server or Oracle.

GLOBAL RESOURCE CENTRE

GlobalResource Center is a Web-based information system used in developing human resources for health.

GlobalResource Center offers a global library of human resources for health, focusing on developing countries.

For example, healthcare personnel can store their individual details in this database. This database can be accessed by a country that needs the healthcare support.

The healthcare personnel can then be contacted via this Web-based database and called to the service. By using this system, countries with health needs can be met.This resources center is managed by Capacity Project and USAID-funded global project.

GLOBAL DISASTER ALERT AND COORDINATION SYSTEM

Global Disaster Alert and Coordination System is a Web-based disaster information management system.

Global Disaster Alert and Coordination System stores disaster events in the database. The data is automatically analysed to determine the help needed by the affected country.

For example, from the Current Disaster Events column, you can be informed of the flood that happened in China.

This alerts people of the surrounding regions to evacuate and move to safer places. People living in Vietnam and Laos will take necessary precautions when floods happen in China.

By using this system, it helps to coordinate the international responses during the disaster.

Global Disaster Alert and Coordination System is a joint initiative of the United Nations and European Commission.

GLOBAL DATA MONITORING INFORMATION SYSTEM

Global Data Monitoring Information System is a Web-based information system that collects data worldwide to sustain social and economic progress in all countries.

Global Data Monitoring Information System is to help countries overcome problems of poverty, health and education.

For example, data collected on HIV statistics is analysed and it was found that millions of death were caused by AIDS. By using this system, medical assistance can be promptly given to those countries affected.

It is an effort by Millennium Development Goals under the World Bank group.

Different Types of Computer

There are a lot of terms used to describe computers. Most of these words imply the size, expected use or capability of the computer. While the term computer can apply to virtually any device that has a microprocessor in it, most people think of a computer as a device that receives input from the user through a mouse or keyboard, processes it in some fashion and displays the result on a screen.

· PC - The personal computer (PC) defines a computer designed for general use by a single person. While a Mac is a PC, most people relate the term with systems that run the Windows operating system. PCs were first known as microcomputers because they were a complete computer but built on a smaller scale than the huge systems in use by most businesses.

· Desktop - A PC that is not designed for portability. The expectation with desktop systems are that you will set the computer up in a permanent location. Most desktops offer more power, storage and versatility for less cost than their portable brethren.

· Laptop - Also called notebooks, laptops are portable computers that integrate the display, keyboard, a pointing device or trackball, processor, memory and hard drive all in a battery-operated package slightly larger than an average hardcover book. 

· Palmtop - More commonly known as Personal Digital Assistants (PDAs), palmtops are tightly integrated computers that often use flash memory instead of a hard drive for storage. These computers usually do not have keyboards but rely on touchscreen technology for user input. Palmtops are typically smaller than a paperback novel, very lightweight with a reasonable battery life. A slightly larger and heavier version of the palmtop is the handheld computer.

· Workstation - A desktop computer that has a more powerful processor, additional memory and enhanced capabilities for performing a special group of task, such as 3D Graphics or game development.

· Server - A computer that has been optimized to provide services to other computers over a network. Servers usually have powerful processors, lots of memory and large hard drives.

· Mainframe - In the early days of computing, mainframes were huge computers that could fill an entire room or even a whole floor! As the size of computers has diminished while the power has increased, the term mainframe has fallen out of use in favor of enterprise server. You'll still hear the term used, particularly in large companies to describe the huge machines processing millions of transactions every day.

· Minicomputer - Another term rarely used anymore, minicomputers fall in between microcomputers (PCs) and mainframes (enterprise servers). Minicomputers are normally referred to as mid-range servers now.

· Supercomputer - This type of computer usually costs hundreds of thousands or even millions of dollars. Although some supercomputers are single computer systems, most are comprised of multiple high performance computers working in parallel as a single system. The best known supercomputers are built by Cray Supercomputers.

· Wearable - The latest trend in computing is wearable computers. Essentially, common computer applications (e-mail, database, multimedia, calendar/scheduler) are integrated into watches, cell phones, visors and even clothing!