Author Topic: Computer Terms Beginning with "R"  (Read 12868 times)

Offline MysteRy

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Re: Computer Terms Beginning with "R"
« Reply #15 on: April 10, 2014, 04:52:56 PM »
Refresh Rate

Computer monitors often have a "maximum refresh rate" listed in their technical specifications. This number, measured in hertz (Hz), determines how many times the screen is redrawn each second. Typical refresh rates for CRT monitors include 60, 75, and 85 Hz. Some monitors support refresh rates of over 100 Hz.

The higher the refresh rate, the less image flicker you will notice on the screen. Typically a refresh rate of less than 60 Hz will produce noticeable flicker, meaning you can tell the screen is being redrawn instead of seeing a constant image. If the refresh rate is too slow, this flicker can be hard on your eyes and may cause them to tire quickly. As if sitting at a computer for several hours wasn't hard enough!

To avoid flicker, you should set your monitor to use the maximum refresh rate possible. This setting is found in the Monitors control panel in Windows and the Displays system preference in Mac OS X. While 60 Hz is considered a good refresh rate, some people will find that 85 Hz is significantly better.

The maximum refresh rate is determined by three factors: 1) The rate your video card supports, 2) the rate your monitor supports, and 3) the resolution your monitor is set at. Lower resolutions (i.e. 800x600) typically support higher refresh rates than higher resolutions (i.e. 1600x1200).

If you have an LCD monitor, you may not be able to adjust the refresh rate. This is because most LCD monitors come with a standard refresh rate that is well above the "flicker" point. LCD monitors produce less flicker than CRT monitors because the pixels on an LCD screen stay lit longer than CRT monitors before they noticeably fade.

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Re: Computer Terms Beginning with "R"
« Reply #16 on: April 10, 2014, 04:53:40 PM »
Registry

This is a database used by Microsoft Windows to store configuration information about the software installed on a computer. This information includes things like the desktop background, program settings, and file extension associations.

The Windows registry consists of the following six parts:

HKEY_User - contains the user information for each user of the system.
HKEY_Current_User - has all the preferences for the current user.
HKEY_Current_Configuration - stores settings for the display and printers.
HKEY_Classes_Root - includes file associations and OLE information.
HKEY_Local_Machine - has the settings for the hardware, operating system, and installed applications.
HKEY_Dyn_Data - includes performance data.

When you install a program, it will usually write some data to the computer's registry. If you want to manually edit the registry for some reason, you can use the "regedit.exe" program, which comes with the Windows operating system. However, you should not edit the registry if you don't know what you're doing because it could disable your computer.

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Re: Computer Terms Beginning with "R"
« Reply #17 on: April 10, 2014, 04:54:22 PM »
Reimage

Example: "A full system backup saved as a disk image can be used to reimage a hard disk."

Reimaging is the process of restoring data to a hard disk from a disk image. When a hard disk is reimaged, the data on the disk is completely erased and rewritten using data from the disk image file. Therefore, reimaging is often done from a recent backup, which allows the user's personal data to be recovered. Reimaging is simpler than reinstalling an operating system since it is performed in a single step, rather than requiring numerous files and programs to be installed.

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Re: Computer Terms Beginning with "R"
« Reply #18 on: April 10, 2014, 04:54:56 PM »
Remote Access

Remote access is just what it sounds like -- the ability to access your computer from a remote location. Programs like PC Anywhere (Windows), Remote Access (Mac), and Timbuktu (Windows and Mac) allow users to control remote computers from their local machine. In order for a remote access connection to take place, the local machine must have the remote client software installed and the remote machine must have the remote server software installed. Also, a username and password is almost always required to authenticate the connecting user.

Remote access is more than just being able to connect to a remote machine -- it is the ability to control the machine once the connection has been made. A remote access program can basically transform your local computer into the the remote computer you connect to. This is great for people who sometimes work from home and for server administrators who frequently need to update and make changes on their server machines. Most remote access programs also allow users to transfer files between the local and remote machines, which can save a lot of commuting time. While remote access can be helpful for many people, don't enable it on your machine unless you absolutely need to. It is just one more security concern you will have to deal with.

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Re: Computer Terms Beginning with "R"
« Reply #19 on: April 10, 2014, 04:55:35 PM »
Remote Desktop

Remote desktop technology makes it possible to view another computer's desktop on your computer. This means you can open folders, move files, and even run programs on the remote computer, right from your own desktop. Both Windows and Macintosh computer support remote desktop connections, though they use different implementations.

Windows XP and Vista both include Remote Desktop as part of the operating system. The Remote Desktop program uses Microsoft Terminal Services and the Remote Desktop Protocol (RDP) to connect to a remote machine. Remote connections can be opened using Windows' Remote Desktop Connection (RDC), which is also referred to as Terminal Services Client (TSC). This program allows users to configure and manage remote connections to other computers. Of course, to connect to another machine, the remote system must be configured to accept incoming RDC connections.

A Windows computer can be configured to accept incoming remote desktop connections by opening the Control Panel and selecting "Performance and Maintenance." Then click the "System" icon and select the "Remote" tab in the System Properties window. Next, check the box that says, "Allow users to connect remotely to this computer." Then click OK. This should enable remote desktop connections to your machine. You can then click "Select Remote Users..." to only provide access to specific users. Of course, if you don't want your computer to be accessed by anyone, leave the "Allow users to connect..." box unchecked.

Mac OS X 10.5 and later includes a feature called Screen Sharing that allows other users to remotely access the computer's desktop. To turn on Screen Sharing, open System Preferences and select the Sharing option. Next, check the "Screen Sharing" check box. You can then add access for specific users in the "Allow access for:" section of the window. If the Mac OS X Screen Sharing option feels a bit limited, you may want to try a program called "Apple Remote Desktop." This program, which is developed by Apple, provides more advanced remote access features and is often used for managing several computers on a network.

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Re: Computer Terms Beginning with "R"
« Reply #20 on: April 10, 2014, 04:56:10 PM »
Remote User

A "remote user" is how a woman might refer to her husband while he is watching TV. In the computer world, however, a remote user is someone who works on a computer from a remote location. For example, if Bob leaves work and forgets to bring a file with him from his office computer, he might be able to connect to his work machine from his home computer and grab the file. When Bob accesses his office computer from home, he is considered a remote user.

Of course, Bob does not want anyone to be able to access his computer remotely. So, he would most likely need to enter a username and password in order to connect to his office machine. Programs like Timbuktu and PC Anywhere allow users to not only connect to their computers remotely, but actually display the interface of the remote machine on their local computer. Unix-based systems such as Mac OS X and Linux allow users to control the computers remotely using the text-based "Terminal" interface. Remote connections can be made over a local network, a direct phone connection, or over the Internet. Of course, the slower the connection, the slower the response time will be from the remote computer.

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Re: Computer Terms Beginning with "R"
« Reply #21 on: April 10, 2014, 05:35:18 PM »
Repeater

A repeater is an electronic device that relays a transmitted signal. It receives a signal on a specific frequency, then amplifies and rebroadcasts it. By amplifying the signal, a repeater increases the transmission range of the original signal.

Repeaters have many applications, but in computing they are most commonly used in wireless networks. For example, a Wi-Fi network in a large home may benefit from using one or more repeaters to relay the signal to different areas of the house. Homes that have brick walls or cement floors may also benefit from having a repeater relay the signal around the obstacle. Businesses often use a series of repeaters to create a single wireless network within a large building.

While repeaters all serve the same purpose, they come in many forms. Some wireless devices, often called "range extenders" are designed to be used specifically as repeaters. Other devices, such as hubs, switches, and routers can all be configured as repeaters using a software utility or web interface that controls the wireless device.

Important: Since repeaters only relay an incoming signal, using a router as a repeater does not make use of its signal routing capability. Therefore, it make more sense to use a range extender as a repeater if possible.

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Re: Computer Terms Beginning with "R"
« Reply #22 on: April 10, 2014, 05:35:50 PM »
Resolution

This term can describe either how many pixels a monitor can display or how fine a printer can print.

1. Monitors. A small monitor may have a resolution or 640 x 480, which means there are 640 pixels horizontally across the screen and 480 pixels vertically. Some other common monitor resolutions are 800 x 600, 1,024 x 768, and 1,280 x 1,024. The higher the resolution, the more that can be displayed on the screen.

2. Printers. Printer resolution measures how fine a printer can print. This measurement is known as dots per inch, or "dpi." The greater the dpi, the better the image clarity. Scanner resolution is also measured in dpi.

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Re: Computer Terms Beginning with "R"
« Reply #23 on: April 10, 2014, 05:36:21 PM »
Restore

The word "restore" means to return something to its former condition. Therefore, when you restore a computer or other electronic device, you return it to a previous state. This may be a previous system backup or the original factory settings.

Restoring a computer, often called a "system restore," is often done as a last resort to fix a problematic machine. For example, if a virus has infected a large number of system files, a system restore may be the only way to get the computer to run smoothly again. If a hard drive has become corrupted and cannot be repaired using a disk utility, it may be necessary to reformat the hard drive and restore the computer from the original operating system installation discs. System restores may also be performed to wipe all data from a computer before selling it or transferring it to another owner.

Since restoring a computer returns it to a previous state, the process also erases any new data that has been added since the previous state. Therefore, you should always back up your data before restoring a computer. The backup should be saved to an external hard drive or another disk other than the one being restored. Once you have restored the computer, you may transfer your files from the backup device back to the computer.

While the term "restore" is often associated with computers, other devices can be restored as well. For example, if a smartphone is repeatedly malfunctioning, it can often be fixed by restoring the system software. Most video game consoles can also be restored by running the restore operation within the system settings. Both iPods and iPhones can be restored using Apple's iTunes software. No matter what device you choose to restore, remember that the process will erase data saved on the device. Therefore, the first step in restoring a computer or any other device should be to back up your personal data.

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Re: Computer Terms Beginning with "R"
« Reply #24 on: April 10, 2014, 05:36:49 PM »
RFID

Example: "RFID tags are often placed inside the retail packaging of small electronic devices."

RFID is short for "Radio-Frequency Identification." RFID tags are small integrated circuits that can be scanned with a radio transmitter. This means they can be simply passed into the range of the transmitter rather needing to be swiped or scanned directly, like a credit card or UPC label. RFID tags have many applications, including inventory tracking, retail loss prevention, electronic toll booth payments, and keyless entry.

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Re: Computer Terms Beginning with "R"
« Reply #25 on: April 10, 2014, 05:37:14 PM »
RGB

Stands for "Red Green Blue." It refers to the three hues of light (red, green, and blue, for those of you that are a little slow), that can mix together to form any color. When the highest intensity of each color is mixed together, white light is created. When each hue is set to zero intensity, the result is black. TVs and computer monitors use RGB to create the colorful images you see on the screen. In print, however, the 4 colors -- cyan, yellow, magenta, and black (CYMK) -- are used to create color images.

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Re: Computer Terms Beginning with "R"
« Reply #26 on: April 10, 2014, 05:37:41 PM »
Rich Text

Rich text is more exciting than plain text. It supports text formatting, such as bold, italics, and underlining, as well as different fonts, font sizes, and colored text. Rich text documents can also include page formatting options, such as custom page margins, line spacing, and tab widths.

Most word processors, such as Microsoft Word, Lotus Word Pro, and AppleWorks, create rich text documents. However, if you save a document in a program's native format, it may only open with the program that created it. For example, Lotus Word Pro will not be able to open an AppleWorks text document, even though both programs are text editors. This is because each program uses its own method of formatting and creating text files.

The good news is, most word processors allow you to save rich text documents in the generic Rich Text Format. This file format, which uses the .RTF extension keeps most, if not all the text formatting. However, because it is a standard format, it can be opened by just about any word processing program and even most basic text editors.

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Re: Computer Terms Beginning with "R"
« Reply #27 on: April 10, 2014, 05:38:07 PM »
Right Click

Most computer mice have at least two mouse buttons. When you press the left one, it is called a left click. When you press the one on the right, it is called a right click. By default, the left button is the main mouse button, and is used for common tasks such as selecting objects and double-clicking.

The right mouse button is often used to open contextual menus, which are pop-up menus that change depending where you click. For example, if you right click on the desktop, you may see a menu pop up that includes "Change View Options" and "Change Desktop Background." If you right click on a folder, the menu might include options such as "Open" and "Properties." Certain programs, such as video games, may use the right click to perform other functions, such as firing a secondary weapon in a first-person shooter. Most programs, however, use the right click to open contextual menus.

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Re: Computer Terms Beginning with "R"
« Reply #28 on: April 10, 2014, 05:38:34 PM »
Ripcording

Recording audio with a computer involves capturing an audio signal and saving it digitally on a hard drive. Ripping an audio track is the process of converting an audio file to an MP3 or other compressed audio format. Ripcording is the simultaneous recording and ripping of an audio signal.

Ripcording is a popular way to download and archive Internet radio broadcasts, digital cable TV radio, and satellite radio. All you need is ripcording software that will record audio and compress it at the same time. By ripcording live audio, you can save audio streams on your hard drive and listen to them whenever you want.

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Re: Computer Terms Beginning with "R"
« Reply #29 on: April 10, 2014, 05:39:05 PM »
RISC

Stands for "Reduced Instruction Set Computing,"and is pronounced "risk." It is arguably the fastest and most effiecient microprocessor technology available today. The RISC architechture is an improvement upon the CISC (Complex Instruction Set Computing) architecture used in the original Intel Pentium chips. In 1974, John Cocke of IBM Research was working on making a faster version of the CISC chip and came up with a design that significantly reduced the number of instructions need for performing computations. The new design was not only faster than the CISC architecture, but the chips were also smaller and less expensive to manufacture. Motorola's PowerPC chips (such as the G4 in Power Macs) are the most widely used RISC-based chips. Intel has slowly been integrating RISC technology into its chips, but they still are mostly CISC-based.