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Types Of Computers
Posted Date: 18 Nov 2007 Resource Type: Articles/Knowledge Sharing Category: Computer & Technology
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Posted By: manjit Member Level: Bronze
Rating:  Points: 5
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There are a lot of terms used to describe computers. Most of these words imply the size, expected use or capability of the computer. While the term computer can apply to virtually any device that has a microprocessor in it, most people think of a computer as a device that receives input from the user through a mouse or keyboard, processes it in some fashion and displays the result on a screen.
1) PC - The personal computer (PC) defines a computer designed for general use by a single person. While a Mac is a PC, most people relate the term with systems that run the Windows operating system. PCs were first known as microcomputers because they were a complete computer but built on a smaller scale than the huge systems in use by most businesses.
2) Desktop - A PC that is not designed for portability. The expectation with desktop systems are that you will set the computer up in a permanent location. Most desktops offer more power, storage and versatility for less cost than their portable brethren.
3) Laptop - Also called notebookslaptops are portable computers that integrate the display, keyboard, a pointing device or trackball, processor, memory and hard drive all in a battery-operated package slightly larger than an average hardcover book.
4) Palmtop- More commonly known as Personal Digital Assistants (PDAs), palmtops are tightly integrated computers that often use flash memory instead of a hard drive for storage. These computers usually do not have keyboards but rely on touchscreen technology for user input. Palmtops are typically smaller than a paperback novel, very lightweight with a reasonable battery life. A slightly larger and heavier version of the palmtop is the handheld computer.
5) Workstation - A desktop computer that has a more powerful processor, additional memory and enhanced capabilities for performing a special group of task, such as 3D Graphics or game development.
6) Server - A computer that has been optimized to provide services to other computers over a network. Servers usually have powerful processors, lots of memory and large hard drives.
7) Mainframe - In the early days of computing, mainframes were huge computers that could fill an entire room or even a whole floor! As the size of computers has diminished while the power has increased, the term mainframe has fallen out of use in favor of enterprise server. You'll still hear the term used, particularly in large companies to describe the huge machines processing millions of transactions every day.
8) Minicomputer - Another term rarely used anymore, minicomputers fall in between microcomputers (PCs) and mainframes (enterprise servers). Minicomputers are normally referred to as mid-range servers now.
9) Supercomputer - This type of computer usually costs hundreds of thousands or even millions of dollars. Although some supercomputers are single computer systems, most are comprised of multiple high performance computers working in parallel as a single system. The best known supercomputers are built by Cray Supercomputers.
10) Wearable - The latest trend in computing is wearable computers. Essentially, common computer applications (e-mail, database, multimedia, calendar/scheduler) are integrated into watches, cell phones, visors and even clothing!
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Responses
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| Author: Arun Jadhav 08 Dec 2007 | Member Level: Diamond Points : 5 | Hi Manjit,
Good information about computers.
Here are the tips for protecting PC(Personal computer):
Use the latest version of a good anti-virus software, firewall, anti spyware software,such as Ad-Aware 2007 which allows update from Internet.
Use the latest version of the operating system, web browsers and e-mail programs. Install Service Pack if any
Don’t open e-mail attachments unless you know the source. Attachments, especially executables (those having .exe extension) can be dangerous. Scan everything you download.
Confirm the site you are doing business with. Secure yourself against "Web-Spoofing". Do not go to websites from email links.Check https in address bar if u r making any transaction .
Create passwords containing at least 8 digits. They should not be dictionary words. They should combine upper and lower case characters.Use different passwords for different websites.
Send credit card information only to secure sites. Use a security program that gives you control over "Cookies" that send information back to websites. Letting all cookies in without monitoring them could be risky
Boot into safe mode and scan. While the scans are going check your registry (Click start --> Run and type regedit to get intot he registry) and look in HKEY_CurrentUser/software/microsoft/windows/currentversion/run & HKEY_Local_Machine/software/microsoft/windows/currentversion/run. Verify that all programs listed are legitimate and wanted.
If or when your antivirus scan comes across anything, search for that file name in your registry and delete it.
Use explorer to go to the windows/system32 folder and sort by date. If you haven't already done so, make sure you can see the entire file names. click Tools --> Folder Options and unclick the box labeled "Hide extensions for known file types" and under Hidden files and folders click "Show hidden files and folders." However, make sure you choose "Hide protected operating system files" so you don't accidentally remove anything that would cripple your computer.. You are looking for recent files with names ending with .exe and .dll that look suspicious. Major culprits will have gibberish names such as alkjdlkjfa.exe.
Make sure your firewall doesn't have strange exceptions
If you suspect anything that is going wrong with your computer, on a more secure system change all your passwords.
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