This is a program that allows you log in to a Unix computer via a text-based interface. If you have an account on a Telnet server, you can access certain resources on the system such your home directory, your e-mail account, FTP files, etc. The downside of Telnet is that, to use it, you need to use Unix commands, which can be a challenge.
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System software refers to the files and programs that make up your computers operating system. System files include libraries of functions, system services, drivers for printers and other hardware, system preferences, and other configuration files. The programs that are part of the system software include assemblers, compilers, file management tools, system utilites, and debuggers.
The system software is installed on your computer when you install your operating system. You can update the software by running programs such as Windows Update for Windows or Software Update for Mac OS X. Unlike application programs, however, system software is not meant to be run by the end user. For example, while you might use your Web browser every day, you probably dont have much use for an assembler program (unless, of course, you are a computer programmer).
Since system software runs at the most basic level of your computer, it is called low-level software. It generates the user interface and allows the operating system to interact with the hardware. Fortunately, you dont have to worry about what the system software is doing since it just runs in the background. Its nice to think you are working at a high-level anyway.
Originating from Newburyport, Massachusetts.
Yeat is a derogatory reaction to display disagreement or discontent with either a person, situation, opinion or proposed situation.
Those who dont understand the usage of the word will often say that it has the capability to take on any meaning the speaker intends. This is completely wrong.
Yeat most often replaces the words and phrases,
A programming language is a set of commands, instructions, and other syntax use to create a software program. Languages that programmers use to write code are called high-level languages. This code can be compiled into a low-level language, which is recognized directly by the computer hardware.
High-level languages are designed to be easy to read and understand. This allows programmers to write source code in a natural fashion, using logical words and symbols. For example, reserved words like function, while, if, and else are used in most major programming languages. Symbols like <, >, ==, and != are common operators. Many high-level languages are similar enough that programmers can easily understand source code written in multiple languages.
Examples of high-level languages include C , Java, Perl, and PHP. Languages like C and Java are called compiled languages since the source code must first be compiled in order to run. Languages like Perl and PHP are called interpreted languages since the source code can be run through an interpreter without being compiled. Generally, compiled languages are used to create software applications, while interpreted languages are used for running scripts, such as those used to generate content for dynamic websites.
Low-level languages include assembly and machine languages. An assembly language contains a list of basic instructions and is much more difficult to read than a high-level language. In rare cases, a programmer may decide to code a basic program in an assembly language to ensure it operates as efficiently as possible. An assembler can be used to translate the assembly code into machine code. The machine code, or machine language, contains a series of binary codes that are understood directly by a computers CPU. Needless to say, machine language is not designed to be human readable.
Stands for Power over Ethernet. PoE provides electrical current over an Ethernet connection. It powers electronic devices via Ethernet cabling without the need for batteries or a wall outlet.
Multiple PoE standards exist, but they all provide both data and electrical power over a single cable. One method, known as Alternative A, uses the same wires within the Ethernet cable to transmit power and data. Alternative B uses one set of wires for sending power and another set of wires for transmitting data.
Technically, the PoE standards are defined as a subset of the IEEE 802.3 collection of standards. Examples include:
In order to power a device via Ethernet, a PoE adapter is required. This device, also called an Ethernet injector, plugs into a standard power outlet and provides power to one or more Ethernet ports. A broad range of PoE devices exist, including:
Audio device with DC and PoE power options
Many websites that host online communities allow you to create you own personal URL within the website. This custom URL typically serves as the Web address of your profile page and can be shared and bookmarked by other users.
Examples of websites that allow you to choose a personal URL include social networking sites like Facebook, photo sharing sites like Flickr, and various Web forums. Users can choose a custom name, which will then become part of their personal URL. For example, a personal URL on Facebook may be http://www.facebook.com/username. The username might be a made up name, such as pinkbunny77 or your actual name, such as john.johnson.
If you have an account on a website that allows you to select a personal URL, but have not chosen one yet, the Web address of your profile page may include a unique ID instead of a username. For example, the Web address of a Facebook profile page might be http://www.facebook.com/profile.php?id=1234567890. Since a username is much easier to remember than a long string of numbers, selecting a username is usually recommended. When you choose your personal URL for Facebook or another website, make sure you decide on one you really like, since you may not be able to change it.
Personal URLs are also called purls, personalized URLs, or custom Web addresses. They are different from personal home pages, which are created and published on a users own website.
A pebibyte is a unit of data storage that equals 2 to the 50th power, or 1,125,899,906,842,624 bytes.
While a petabyte can be estimated as 10^15 or 1,000,000,000,000,000 bytes, a pebibyte is exactly 1,125,899,906,842,624 bytes. This is to avoid the ambiguity associated with the size of petabytes. A pebibyte is 1,024 tebibytes and precedes the exbibyte unit of measurement.
For a list of other units of measurements, view this Help Center article.
Stands for Peripheral Component Interconnect Extended. Once again, Ex is abbreviated with an X instead of an E. Most desktop computers include one or more PCI slots for expanding the computers I/O capabilities. Common PCI cards include network cards, sound cards, and video cards. In the early 1990s, when PCI was first introduced, the 66 MHz speed of PCI was more than sufficient for PCI cards available at the time. However, a decade later, expansion cards supported much faster data transfer rates and therefore became faster than the PCI bus would support. To prevent the interface from becoming a bottleneck, PCI-X was introduced.
The first version of PCI-X supported data transfer rates of 133 MHz, which is more than twice as fast as the original PCI standard. Then along came PCI-X 2.0, which can run at speeds of 266 or 533 MHz. These speeds are fast enough to support Gigabit Ethernet cards and video capture devices without slowing them down. PCI-X cards can only be installed in PCI-X slots, but the slots themselves are backwards compatible with PCI cards.