Classification of Computers

According to the generation

• First generation computers - Vacuum tubes were used to design computers of this generation.
• Second generation computers - Transistors were used to design computers of this generation.
• Third generation computers - Integrated Circuits (IC) were used to design computers of this generation.
• Fourth generation computers - Microchips or Microprocessors were used to design computers of this generation.
• Fifth generation computers - Computers that are supposed to have the thinking ability are called fifth generation computers. Scientists are trying hard to develop the fifth generation computers using 'Artificial Intelligence'.

According to the size

• Super computers - Computers which are designed for a specific purpose with very high performance and capabilities are called as such. 
• Mainframe computers - These are the large scale computers. 
• Mini computers - Medium size computers can be called mini computers. 
• Micro computers - Extremely small computers that can be called micro computers.

According to the technological development

• Personal computers (PCs) - Computers designed for individual's use are called personal computers and this type of computers has been widely developed now. Personal computers are also known as ' Desktop Computers'.
• Laptop computers - These are portable computers designed to be carried about. These are known as the 'Note book computers' or 'Portable computers'.
• Palmtop computers - These are the computers that can be held on palm. Palmtops are also called 'Personal Digital Assistants' (PDAs).
• Work station computers - The name 'Workstation computers' is used for desktop computers made with high capacities. These are widely used to design more complex graphic designing and 3D animations and also serve as server computers.

According to the purpose

• Computers designed for usual and day - to - day activities are called General Purpose Computers.
• Computers designed for special purposes such as scientific experiments, battle operations, discovery of oil rigs etc.. are called Special Purpose Computers.

According to the design technology

• Digital computers - Computers designed by using the binary digital number system are called digital computers.
• Analog computers - Computers which are designed considering the physical data such as temperature, thrust, and pressure are called analog computers.
• Hybrid computers - A combination of the above two types of computers can be called hybrid computers.

Computer Games

Sports have got a special place in our daily life. It not only provides enjoyment, but also increase physical and mental solace. Today the computer with its related equipment are used as gaming equipment. So, as mentioned earlier, it not only provides enjoyment but also helps to increase knowledge in various fields.
When we play computer games, it is an important fact that games can be set according to an individual's age, knowledge level or skill level. Especially games such as chess can be highlighted here.
Such sports will enhance our intelligence, skills to take quick decisions and creativity.
Computer games help to improve the knowledge, creativity and analyzing skills not only on mathematics, science and technology but also on many other subjects like language, music and art. Computer games are popular media that helps mental relaxation and reducing physical fatigue.
However, addiction to computer games and gambling are the bad sides of computer games.

Identify the various categories of website users and describe in detail.

• Expert users (meaning with extended experience in the application) expects advance features and capabilities. They will want more customization options. Since they have a stable mental model of the application structure they feel free to explore the application and try new things. They will not be too worried about making mistakes since they feel secure that they will know how to bypass them.
• Novice users: on the other hand, are new to the system and will need a simple and basic interface. Since they are new in the system they will expect more secure ways of doing things in the system (for example they will choose the templates or wizards to do their first steps in the system). Novice users' interface should provide simple ways to achieve important frequently performed tasks. When designing to novice users we should remember what the main use cases and don't shadow them with unnecessary features. 
• Users with special needs: Users with special needs who are not sufficiently visually impaired to require assisted technologies can still be frustrated by poor contrast, problematic color schemes, or tiny, unreadable text. Up to 10% of men are color blind to some extent, and the increasing number of older users is less likely to have 20/20 vision than those designing the pages.

Email

*What is meant by attachment facility?
  The attachment information with e-mail.
  These attached information can be sent as attached files.
  The files may be text files or document files.
  By the attachment facility we can send any number of files with email.
*What is the use of email dictionary?
  While sending email the email dictionary helps to know the meaning of the word, if we need.
*What is the use of spell check?
  It helps to make spelling corrections in the email which we typed.
*What is the use of treasures?
  The facility which gives different words in similar meaning.
*What is mean by inbox?
  Inbox is which we receives all the emails to a person who holds email address.
*How can we erase the unwanted email?
  Select the unwanted emails and press the delete button.

Software

*What is a software?
  Software refers to the set of computer programs, procedures and associated documents.
*What are the types of software?
  Application Software
  System Software
*What is an application software?
  Application software is a set of programs designed to carry out operations for specified purpose.
*What is system software?
  System software is a set of  programs designed to control the operation of a computer system.

what are the major factors to be concerned when buying a computer for yourself?

• Choose a specialty store, consumer electronics store, retail chain, limited service discount chain, local computer builder or mail-order/Internet vendor, based on your hardware and service needs. 
• Buy when you need to buy. No matter how long you wait for the best deal, the same configuration will cost less in six months.  
• Decide which features you'll need based on what you're going to do with the computer. For example, if you're going to be creating graphics, sound and video, you'll want plenty of RAM. If you're going to be doing heavy computational tasks (searching large databases, watching video), you'll want a super processor.  
• Decide if you want a laptop, which you can carry around with you, or a desktop model.
•  Choose a computer brand based on quality, price and technical support. 
• Based on your likely needs, determined earlier, figure out the core configuration you need, including processor and speed, amount of RAM and hard drive size. 
• Determine additional drives you need: CD-ROM, DVD-ROM, CD recorder, Zip. 
• Select peripherals and additional hardware such as modems, sound cards, video cards and speakers. 
• Decide how many extra internal card slots and disk-drive bays you'll need in order to allow room for future expansion. 
• Determine what pre-installed software you want or need. Get at least an operating system, such as Windows, an anti-virus program, and programs for word processing, spreadsheets, databases and keeping your checkbook. 
• Choose the length of warranty or service coverage appropriate to your needs.
  

Computer technologies used in the Insurance Company

Technology pays a tremendous role in the modern insurance industries. The use of computers, specifically, has allowed changes with regard to how data is retained and transactions conducted. Computers also link up branches from anywhere in the world. Communication and information transfer happens in a matter of moments. These functions make computers an extremely valuable tool in the insurance industries.

Computers are instrumental to the way the Insurance Company performs its business. This technology allows Insurance to be able to take transactions and update accounts in real time. Online Insuring is another effect of computer technology on the insuring industry; computers allow people to set up automatic payments from their bank accounts to such places as utility companies and insurance groups. The insurance industry uses sophisticated computer software to analyse risk. Automated underwriting systems adjust premiums and recommend acceptance or denial of risk for a potential client. With the use of the Internet, insurance companies are able to access information which will determine whether they accept client or not.

Computers decrease the amount of time needed to perform complex calculations and allow professionals in this industry to calculate many formulas at the same time. Computers also increase the efficiency of this industry by reducing the potential of humans to err and make incorrect calculations. Computer technology makes this information more easily accessible and also requires less amount of physical space. Records can be backed up easily with computer storage.