We all need to pay attention to this.

ICT Applications discussed in the following areas

- Communication

- Modelling

- Manufacturing

- School Management System

- Booking System

- Banking System

- Medicine

- Expert Systems

- Recognition System etc.

The introduction of microprocessor-controlled devices into our everyday lives has had a profound effect in a number of ways, some of which are positive and some of which are negative. This chapter will consider the effects of devices used in the home and elsewhere and how they have changed how we live.

We will also consider the health risks posed by prolonged use of computers at home and work.

Most computer systems are now connected in some way to form network. This ranges from a basic home network of only a few devices to very large networks, often set up to share resources, such as printers or software. The largest network is the Internet itself.

Crossroads everyone encounters in life.

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Secondary storage includes all non-volatile devices that are not part of primary memory. They allow data to be stored as long as required by the user. This type of storage is much larger than RAM and ROM (primary memory), but data access time is considerably longer. All applications, the operating system, device drivers and general files (for example, documents, photos and music) are stored in secondary storage. There are three different categories of secondary storage which are based on technology that uses the following media:

As the name suggests, these are hardware devices that allow data to be entered into a computer. Many such devices exist, ranging from the more common ones, such as the keyboard, to more specialist devices, such as barcode readers. This section describes some of these.

Computer systems are now commonplace in every part of our daily life. This first chapter introduces the basic components that make up these computer systems; most of which will be described in much greater depth in later episodes. Basic components, including hardware (both external and internal) and software (both applications and systems), are all briefly introduced in the following sections. Comparing books with computers is a good analogy: the actual pages and the ink used on the pages are equivalent to the hardware used to make up computers; the words written on these pages are equivalent to the software. Without the words, the book is useless. Similarly, computers would be useless to any of us without software.

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