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Care and Feeding of Your Computer

Care and Feeding of Your Computer
To keep your computer running smoothly and to ensure that it has a long and productive life, follow these tips.
  Keep the computer away from heat sources (like radiators and heat registers).  Heat is a computer's enemy.
  There is a fan built into the back of the CPU case.  Keep this unobstructed and clean.   A vacuum cleaner nozzle with a brush attachment is a useful fan cleaning tool
Don't spill liquids on any part of the computer.  Liquids spilled on the keyboard or mouse might cause all kinds of electrical problems.
Clean the keyboard with a vacuum cleaner nozzle equipped with a brush tool.  
Periodically clean the air vents on the side and back of the monitor with the vacuum brush.
Keep the monitor screen clean with a soft cloth.  Use no detergents, chemicals or soaps.   It works best if you clean the monitor when it is off.  Otherwise, static electricity can compete with your cloth for the dust and grime.
Wipe off the keyboard keys with a soft cloth dampened with rubbing alcohol or other mild cleanser.  Washing your hands before using the keyboard will keep it cleaner.   Eating greasy finger foods while using the computer is not recommended.
About once a year, unhook the CPU case, take it outside (on a nice clear warm day), remove the case cover and take a look inside.  If it has accumulated a lot of dust, cobwebs, and grit, you might want to invest in a can of compressed air and give it a good blast to clean it.  Unless you know what's what, you shouldn't probe around with your fingers.   Static discharges can zap sensitive electronic components.
 Super computer
 Mainframes compuer
 microcomputer

INTRODUCTION

The word ‘computer’ is an old word that has changed its meaning several times in the last few centuries. Originating from the Latin, by the mid-17th century it meant ‘someone who computes’. The American Heritage Dictionary (1980) gives its first computer definition as “a person who computes.” The computer remained associated with human activity until about the middle of the 20th century when it became applied to “a programmable electronic device that can store, retrieve, and process data” as Webster’s Dictionary (1980) defines it. Today, the word computer refers to computing devices, whether or not they are electronic, programmable, or capable of ‘storing and retrieving’ data.

The Techencyclopedia (2003) defines computer as “a general purpose machine that processes data according to a set of instructions that are stored internally either temporarily or permanently.” The computer and all equipment attached to it are called hardware. The instructions that tell it what to do are called "software" or “program”. A program is a detailed set of humanly prepared instructions that directs the computer to function in specific ways. Furthermore, the Encyclopedia Britannica (2003) defines computers as “the contribution of major individuals, machines, and ideas to the development of computing.” This implies that the computer is a system. A system is a group of computer components that work together as a unit to perform a common objective.

The term ‘history’ means past events. The encyclopedia Britannica (2003) defines it as “the discipline that studies the chronological record of events (as affecting a nation or people), based on a critical examination of source materials and usually presenting an explanation of their causes.” The Oxford Advanced Learner’s Dictionary (1995) simply defines history as “the study of past events.…” In discussing the history of computers, chronological record of events – particularly in the area of technological development – will be explained. History of computer in the area of technological development is being considered because it is usually the technological advancement in computers that brings about economic and social advancement. A faster computer brings about faster operation and that in turn causes an economic development. This paper will discuss classes of computers, computer evolution and highlight some roles played by individuals in these developments.

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