ROLE OF COMPUTERS IN ENVIORNMENTAL SCIENCE

M.Sc [Second Semester]

Presentation

WHAT IS COMPUTER SYSTEM• A computer system is

defined as combination of components designed to process data and store files.

• A computer system requires hardware, software and a user to fully function.

USER HARDWARE

SOFTWARE

Computer Hardware

HARDWARE

There are three component in hardware:1. Input devices 2. Output devices3. Storage devices 4.Processor

Input Devices• Input devices are any electronic device

that are connected to a computer and produces input signals such audio, text, video, graphic.

Output Devices• Output is the result of data processing

activity when it is presented externally to the system. The output from a computer can be printed or displayed form .

• An output device is hardware that is capable of delivering or showing information to one or more users.

Storage Devices• Information and documents are stored

in a computer storage so that it can be retrieved whenever they are needed later on.

• Computer storage is the holding of data in an electromagnetic form for access by a computer processor.

Computer Software

COMPUTER SOFTWARE

SYSTEM SOFTWARE

APPLICATION SOFTWARE

Computer Useruses the computer for any purposes such as work, business

and entertainment.

TEACHERCHILDRENOFFICIER

STUDENTS PARENT BUSSINESS

1. It is self directing. The user merely feeds all the instructions to the computer at the start and later proceeds without any need for human intervention.

2. Ability to store and retrieve information. The computer has the ability to remember or recall data when finds the need for them.

3. Ability to perform mathematical operations and solve complex formula at high speed and with great precision. A very fast computer can perform the addition of 20 million pairs of ten-digit numbers in one second.

CAPABILITIES OF COMPUTERS

4. Ability to perform logic operation. The computer is capable of comparing numbers, letters of alphabet and special characters. Based on the results of comparison, the computer can direct to take alternative actions.

5. Ability to perform logic operation Large amounts of data can be held on compact storage devices. This allows organisations to cut down on office space, rent and/or building purchase costs. Also allows for cleaner, tidier working environment.

CAPABILITIES OF COMPUTERS

1. It can do only what is designed or programmed to do.

2. It cannot correct input data.

3. It cannot think and cannot derive meanings from objects. The computer cannot interpret your favorite poem or your present mood

.4. It can only process jobs expressed in a number of steps leading to a

precisely defined goal.

5. It cannot completely avoid making errors due to power fluctuations, system malfunctions and human disorders.

LIMITATIONS OF COMPUTERS

6. Setting up a computer-based system costs money. There is the initial investment of money on hardware and software. Periodically, updates will be necessary. Maintenance of the system costs money.

LIMITATIONS OF COMPUTERS

7. Organisations can become to dependent on computer based systems. Occasionally they will malfunction. If the break down is critical, business could be lost. A worst case scenario is the organisation going bankrupt.

THANK YOU A LOT…