1. To prevent electric shock or electrocution.
2. To avoid component damage.
1. To prevent electric shock or electrocution - A PC that is plugged in means AC power is still available on powerlines inside the computer and a poorly grounded or unshielded power supply can expose the whole computer case to AC and any contact will result in electrocution. This is mainly for the protection of the computer technician.
2. To avoid component damage. - A PC has several components inside that are sensitive to motion while powered or plugged in. This are components are charged up. They can only be discharged internally once unplugged. This mainly focuses on the protection of computer and its peripherals from accidental short circuit and improper static discharge.
Primary sources are original materials on which other research studies are based. Primary sources report a discovery or share new information ; they present first-hand accounts and information relevant to an event [3, 4a and 5]. They present information in its original form, not interpreted or condensed or evaluated by other writers . They are usually evidence or accounts of the events, practices, or conditions being researched [4a, 6] and created by a person who directly experienced that event . Primary sources are the first formal appearance of results in print or electronic formats . Examples of primary sources are: eyewitness accounts, journalistic reports, financial reports, government documents, archeological and biological evidence, court records, ephemerals (posters, handbills), literary manuscript and minutes of meetings etc [3,4b and 6].
The definition of a primary source may vary depending upon the discipline or context. A diary would be a primary source because it is written directly by the individual writing in the diary . Interviews are primary sources because the individual talks about the topic directly from what he/she knows about it.
Personal computer is a type of computer which is designed for personal use or a computer which is for use of one person. Basically, personal computer design is for common people meaning the specifications and design of this computer doesn't really have to be advance or high. Normally, personal computer is made up of basic computer parts, operating system and office productivity software which are helpful in their business, office and research activities. Often, personal computers are using free software rather than commercial software. Libre Office is the most common office productivity software installed in personal computers. These are open source and can be easily found online. Libre Office also works regardless of the operating system installed in your computer and it doesn't use much of memory and storage space.
To know more about computer, read the following:
Personal computers in different computers :
What is the difference between computer and computer science? :
What is computer ? define computer and what is the importance of it ? :
— Very easy to use
— makes work more easier
— makes work faster
— false information
— sometimes results to procrastination